--- title: Gerbil — Care & Reference Manual author: codebuddy type: manual llm_refined: true refined_by: kimi manual_v2: true date: 2026-08-04 source_topics: exotic_pet_profile_gerbil, exotic_pet_food_nrc_standard_map, exotic_nutrition_gerbil_feeding, exotic_nutrition_gerbil_wild_diet, exotic_nutrition_gerbil, exotic_pet_nutrition_gerbil_safe_greens, exotic_nutrition_rat_mouse_chow, exotic_husbandry_gerbil_diet, exotic_life_stage_gerbil, exotic_behavior_gerbil, exotic_enrichment_gerbil, exotic_grooming_gerbil, exotic_breeding_gerbil, exotic_gerbil_tyzzer, exotic_health_gerbil_emergency, exotic_gerbil_nasal_dermatitis, exotic_gerbil_neoplasia, exotic_gerbil_seizures, exotic_tox_gerbil_penicillin, exotic_tox_gerbil_foods, exotic_pet_legality_crosswalk_gerbil, evidence_exotic_gerbil_husbandry_health, evidence_exotic_gerbil_toxicology, evidence_exotic_gerbil_nutrition source_hash: 9c83858561848922 draft: false --- # Gerbil — Care & Reference Manual *LLM-refined manual (v2 pipeline, kimi, 2026-08-04; docs/MANUAL_V2_DESIGN.md).* This manual assembles the verified fact blocks in Pet Data Station that mention *gerbil*, organised along a pet owner's journey. Every quoted fact is reproduced **verbatim** from its cited first-hand source (`[n]` superscripts; see References, each tagged with a computed trust grade per docs/topic_grading_guide.md) and is independently checkable. Guide sections (checklists, red-flag box) are orientation prose in which **every factual sentence carries its own `[n]`**; derived-summary blocks from non-Open-Access sources keep their *Paraphrased derived summary* mark. Mis-sectioned, duplicate, off-topic and image-residue fragments were removed by the v2 builder (build-gate enforced). ## Contents 1. [Species Profile](#species-profile) 2. [Life-Stage Care](#life-stage-care) 3. [Is this pet right for you?](#is-this-pet-right-for-you) 4. [Daily & Weekly Care Checklist](#daily-weekly-care-checklist) 5. [Nutrition](#nutrition) 6. [Husbandry](#husbandry) 7. [Behavior & Training](#behavior-training) 8. [Enrichment & Exercise](#enrichment-exercise) 9. [When to call a vet NOW](#when-to-call-a-vet-now) 10. [Health & Disease](#health-disease) 11. [Toxicology & Hazards](#toxicology-hazards) 12. [Grooming](#grooming) 13. [Breeding & Neutering](#breeding-neutering) 14. [Regulations & Legality](#regulations-legality) 15. [Appendix A — Commercial Food & Regulatory Notes](#appendix-a-commercial-food-regulatory-notes) 16. [Appendix B — Research Evidence](#appendix-b-research-evidence) ## Species Profile The profile below records this species' taxonomy, natural origin and lifespan as documented in the cited reference. ### Mongolian gerbil (Meriones unguiculatus) — species profile (taxonomy, geographic range, habitat, physical description, behavior, wild diet, reproduction, lifespan) > Mongolian gerbils, or Mongolian jirds, occur naturally in the highlands of Inner Mongolia. [1] > They are also found in adjacent parts of southern Siberia and northern China, including Sinkiang and Manchuria provinces. [1] > Currently Meriones unguiculatus is a popular housepet and is widely used in research. [1] > It can be found worldwide in a variety of locales and environments (Agren et al. 1989). [1] > Mongolian gerbils live in the highlands in Inner Mongolia. [1] > Climate in these regions is extreme, temperatures can vary from -40 degrees Celsius in the winter to 50 degrees Celsius in the summer. [1] > These areas are characterized by low annual precipitation (less than 230 mm a year) and a long winter (October to April). [1] > Gerbils, or jirds, live in clay or sandy deserts, grasslands, scrub, arid steppes, and mountain valleys. [1] > Mongolian jird body length averages 120 mm long, tail length may range up to 120 mm. [1] > The fur is thin, with grey roots, a yellow shaft, and a black tip. [1] > Ventral fur is white and their unfurred claws reveal their pink/white skin. [1] > Males are slightly larger than females, with males averaging 60 grams and females averaging 50-55 grams (van Veen 1999). [1] > Mongolian gerbils have some interesting behaviors. [1] > Each family group of gerbils seems to be led by an alpha male that is larger than the rest. [1] > Family and territory size (anywhere from 325 to 1550 square meters) seems to be dependent on alpha male size. [1] > There are 2-3 times more females than males in any family but family size rarely exceeds 20 animals. [1] > Saltwort ( Salsola collina ), bristle grass ( Setaria viridis ), and lyme grass ( Leymus chinensis ) are also eaten. [1] > Gerbils conserve both water and fat extremely well. [1] > They conserve water by producing a highly concentrated urine and dry feces. [1] > Captive mongolian gerbils eat a wide variety of foods, including grains, grasses, and some fruits and vegetables. [1] > Wild mongolian gerbils breed between February and October, producing up to three litters. [1] > The estrus cycle lasts 4-6 days and a post-partum estrus can occur. [1] > Litter size varies between 1 and 12, but averages 4 to 7. [1] > Mongolian gerbil populations are stable. [1] > Their adaptations to their harsh natural enviroments makes them suited for living in many parts of the world. [1] ## Life-Stage Care Young, adult and senior care for this species, drawn from first-hand care pages and veterinary references. ### Gerbil — life stage (owner-practical care, Merck Veterinary Manual pet-owner) *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Adapted to dry desert conditions, gerbils drink little — about 4 mL (under 1 teaspoon) per day for an adult. [2] > While the gerbil adjusts, let it climb over your palm before lifting it out. [2] > The best way to lift a gerbil is to scoop it up under the belly with both hands. [2] > Average lifespan in captivity: 2.0 years [1] ## Is this pet right for you? - **Highly social, keep in pairs:** gerbils are highly social and live in family groups in the wild, and are best kept in pairs (ideally same-sex siblings). [2] - **Territorial at first:** when adding a new gerbil to an established cage, supervise the introduction because they may be territorial initially and need time to adjust. [2] - **Solid-floor cage with deep bedding:** gerbils need a cage with a solid (non-mesh) floor because they often stand on their hind legs, and bedding about one-third deep lets them dig and hoard food. [2] - **Not for very young children:** because of their small size, gerbils do not tolerate rough handling and are not recommended for very young children. [2] - **Daily attention:** it is wise to observe a gerbil's condition and behaviour daily; they are sensitive to stress, so do not startle them or pick them up while sleeping. [2] ## Daily & Weekly Care Checklist Every day: - **Feed a gerbil-specific diet:** pet gerbils need a good-quality balanced diet made specifically for gerbils (compound pellets or a seed mixture), and you should follow the manufacturer's guidance for how much to feed. [3] - **Pelleted chow amount:** a pelleted rodent diet with 18–20% protein works well; about 5–8 g/day of pelleted chow is recommended. [4] - **Keep treats small:** other foods besides pellets should be no more than 20% of the total diet, with about ½ teaspoon of nuts/seeds per day. [5] - **Fruit and veg supplement:** supplement the diet with fruit (pear, melon, apple, orange) and vegetables (cucumber, carrot, pumpkin, fennel); pumpkin seeds are a healthy treat. [3] - **Avoid poisonous foods:** grapes and rhubarb are poisonous to rodents and must not be fed, and excessive fatty seeds such as sunflower seeds can cause obesity and should be limited. [3] - **Water always:** fresh, clean drinking water must be constantly available in a bottle with a metal sipper tube; check it daily for leaks or blockages (adults drink only about 4 mL/day). [3] [2] - **Clean the bottle:** wash the water dispenser thoroughly every time it is refilled. [2] - **Encourage foraging:** scatter food on the bedding surface to encourage natural foraging and prevent squabbling. [3] - **Daily health watch:** observe your gerbil's condition and behaviour daily and do health checks so you quickly notice signs of illness or pain. [2] [6] - **Sand bath:** gerbils may benefit from regular sand or dust baths; rolling in sand helps these desert animals keep their fur clean. [2] Every week: - **Rotate the cage:** periodically rearranging the cage contents helps keep a gerbil stimulated. [2] - **Safe gnawing branches:** provide safe branches for gnawing (willow, hazel, beech, birch, fruit-tree) and never give ivy, yew or holly, which are poisonous. [6] - **Watch humidity:** keep the enclosure below about 50% relative humidity, because nasal dermatitis is more likely above that level. [7] ## Nutrition The staple is a good-quality gerbil diet (compound pellets or a seed mixture); a pelleted rodent diet with 18–20% protein fed at about 5–8 g/day supports them, while homemade diets, sunflower seeds or table scraps cause nutrient deficiencies. [3] [4] The quotes below summarise this species' dietary requirements and nutrition-related disease risks, drawn from professional veterinary references. ### Gerbil feeding — commercial gerbil diet (pellets/seed mix) + fruit/veg supplement; water bottle *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Gerbils naturally eat seeds of various grasses, bulbs, leaves and herbs. [3] > Pet gerbils need a good-quality balanced diet made specifically for gerbils (compound pellets or a seed mixture), formulated to meet their biological needs. [3] > Follow the manufacturer's guidance for how much to feed. [3] > Supplement the diet with fruit (such as pear, melon, apple, oranges) and vegetables (such as cucumber, carrot, pumpkin and fennel); pumpkin seeds are a healthy treat. [3] > Fresh, clean drinking water must be constantly available in a bottle with a metal sipper tube; check it daily for leaks or blockages. [3] ### Gerbil nutrition — natural (wild) diet of Mongolian gerbils *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > In the wild, Mongolian gerbils eat green plants, roots, bulb seeds, cereals, fruit and insects. [7] ### Gerbil nutrition — seed-based diet and supplemental protein *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Wild Mongolian gerbils eat green plants, roots, bulbs, seeds, cereals, fruit, and insects. [4] > Gerbils hoard food and rarely eat feces unless undernourished. [4] > They do well on pelleted rodent diets with 18–20% protein. [4] > Homemade diets, sunflower seeds, or table scraps cause nutrient deficiencies. [4] > Sunflower seeds are high-fat and low-calcium. [4] > About 5–8 g/day of pelleted chow is recommended. [4] > Diets over 4% fat raise blood cholesterol (lipemia), more pronounced in males. [4] > Gerbils pass little urine and hard, dry droppings. [4] > Nasal dermatitis: clean lesions and give topical or parenteral antimicrobials, but avoid streptomycin (fatal in gerbils). [4] > Tyzzer disease (Clostridium piliforme) is the most reported fatal infection in gerbils. [4] > Gerbil fatal enterotoxemia (Clostridioides difficile) has followed triple-antibiotic wafers used to clear Helicobacter. [4] > Pinworms respond to fenbendazole in feed (150 ppm, every other week for 9 weeks) or oral paste (12 mg/kg once). [4] ### Gerbil safe greens & vegetables — seed- and herb-eating rodent; pellet base, fruit/veg supplement, rodent toxins *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Safe greens include the fruit and vegetables that supplement the base pellets — fruit such as pear, melon, apple and orange, and vegetables such as cucumber, carrot, pumpkin and fennel. [3] > Pumpkin seeds are a healthy treat; gerbils like to sit up and hold pieces of food to gnaw. [3] ### Rat, mouse, hamster and gerbil nutrition — rodent chow composition and treat limits (VIN Veterinary Partner) > Rats, mice, hamsters and gerbils have similar dietary requirements. [5] > The basic diet for this group should consist of a good quality rodent chow or lab block. [5] > Rodent chows should have a minimum of 16% protein and 4 to 5% fat content. [5] > Good quality rodent chows are considered to be fairly complete diets for this group. [5] > Other foods can be fed in addition to the commercial pellets but should not constitute more than 20% of the total diet. [5] > Fruit and vegetables as described for the rabbits, guinea pigs and chinchillas can be offered at a rate of about 1 teaspoon/day. [5] > A reasonable amount of nuts and or seeds would be a total of 1 teaspoon/day for rats and about ½ teaspoon for the other species. [5] > Pelleted food should be purchased in amounts that will be used within three months to prevent spoilage. [5] > Gerbils spend much of their time foraging. [1] ## Husbandry Use a secure, easy-to-clean cage with a solid (non-mesh) floor and about one-third-deep bedding so gerbils can dig and hoard; hiding and burying food in the bedding is normal behaviour. [2] Housing, environment and daily-care essentials for this species. ### Gerbil diet — wild diet of vegetation/seeds/insects; hoarding; not coprophagic *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > In the wild, Mongolian gerbils eat green vegetation, roots, bulb seeds, cereals, fruits, and insects. [7] > Gerbils hoard food and are not normally coprophagic (do not eat their own faeces), unless their diet lacks adequate nutrients. [7] > Fed standard rat/mouse diets, gerbils commonly develop gradual, silent periodontal disease after about 6 months of age. [7] > On those same diets, roughly 10% of gerbils become obese, and some show reduced glucose tolerance, increased blood insulin, and diabetic changes in the pancreas and other organs. [7] > *[Paraphrased derived summary — non-Open-Access source.]* Scatter food on the bedding surface to encourage natural foraging and prevent squabbling. [3] > *[Paraphrased derived summary — non-Open-Access source.]* Gerbils need a cage with a solid (non-mesh) floor because they often stand on their hind legs. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Bedding about one-third deep lets gerbils dig and hoard food and helps absorb urine. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Hiding and burying food in the bedding is normal gerbil behaviour. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Periodically rearranging the cage contents helps keep a gerbil stimulated. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Do not take a new gerbil out of its cage immediately after bringing it home. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Whatever cage is used must be secure against escape and easy to clean. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Begin by sitting quietly beside the cage, talking softly or offering a treat from an open palm. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Hold the gerbil over its cage or your lap so it cannot escape if it wriggles free. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Let the gerbil climb over your palm before lifting it out of its cage. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Bedding made from recycled paper products is safe and easy to clean. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Avoid cleaning the cage during the first few days after pups are born. [2] > *[Paraphrased derived summary — non-Open-Access source.]* Gerbils are prone to developing nasal dermatitis when the relative humidity rises above 50%; keeping the enclosure at lower humidity is advisable. [7] ## Behavior & Training Gerbils are highly social and generally friendly and easy to socialise, but may be territorial when first introduced; avoid startling them or lifting them while sleeping. [2] Socialisation, bonding, play and preventing boredom / behaviour problems. ### Gerbil — behavior (owner-practical care, Merck Veterinary Manual pet-owner) *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Gerbils are highly social and live in family groups in the wild. [2] > When adding a new gerbil to an established cage, supervise the introduction; they may be territorial at first and need time to adjust. [2] > Gerbils are generally friendly and easy to socialise. [2] > To avoid stress, do not startle a gerbil or pick it up while it is sleeping. [2] > It is wise to observe a gerbil's condition and behaviour daily. [2] > Because of their small size, gerbils do not tolerate rough handling and are not recommended for very young children. [2] > *[Paraphrased derived summary — non-Open-Access source.]* When adding a new gerbil, supervise; they may be territorial initially and need time to adjust. [2] ## Enrichment & Exercise Toys, foraging, hiding and exercise to prevent boredom. ### Gerbil — enrichment (owner-practical care, Merck Veterinary Manual pet-owner) *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Gerbils are active and enjoy climbing and burrowing. [2] > Like chinchillas, gerbils may benefit from regular sand or dust baths; rolling in sand helps these desert animals keep their fur clean. [2] > In the wild, gerbils build elaborate burrow systems. [2] > Many owners supply plastic tubing and structures that allow climbing and burrowing. [2] > Sturdy rocks, wooden planks and ladders also provide climbing opportunities. [2] > Because gerbils chew everything, avoid toys with pieces that could harm them if swallowed. [2] > Small cardboard boxes and toilet-tube rolls make cheap, readily available toys even if quickly shredded. [2] > Some owners give gerbils an exercise wheel. [2] > Traditional slatted hamster wheels can trap a gerbil's feet or delicate tail. [2] > Choose a solid-surfaced wheel, or tape over the outside of a slatted one to make a solid surface. [2] ## When to call a vet NOW - **Daily checks catch illness:** do daily health checks so you quickly notice signs of illness or pain and can get the gerbil to a vet promptly. [6] - **Redness around the nostrils:** gerbils with nasal dermatitis first show redness (erythema) around the external nostrils — book a vet visit, and keep humidity below 50% to reduce risk. [7] - **Seizures in a young gerbil:** some gerbils inherit a predisposition to reflex epilepsy and show repeated clonic-tonic seizures beginning at about 2 months of age — see a vet. [7] - **Vet-only medicines:** only ever give medicines specifically recommended for gerbils by a vet; a penicillin–dihydrostreptomycin injection can be fatal (50 mg causes almost 100% mortality in adults). [6] [8] - **If it ate something poisonous:** grapes and rhubarb are poisonous to gerbils, and ivy, yew or holly branches are poisonous — keep them out of reach and call a vet immediately if any was ingested. [3] [6] ## Health & Disease Key health risks include Tyzzer disease (the most frequently reported fatal infection), nasal dermatitis above 50% humidity, inherited reflex epilepsy from about 2 months, and 25–40% neoplasia in gerbils over 2–3 years. [7] Common conditions and their clinical signs, drawn from professional veterinary references. If you notice worrying signs, contact a species-experienced veterinarian promptly. ### Gerbil Tyzzer disease: fatal enterohepatic infection caused by Clostridium piliforme *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Tyzzer disease is a naturally occurring infection of the intestine and liver caused by the obligate intracellular bacterium Clostridium piliforme, and is the most frequently reported fatal infectious disease of gerbils. [7] ### Gerbil emergency / urgent signs — daily checks, vet-only medicines, poisonous branches *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Do daily health checks so you quickly notice signs of illness or pain and can get the gerbil to a vet promptly. [6] > Only ever give medicines specifically recommended for gerbils by a vet. [6] ### Gerbil nasal dermatitis — humidity >50% predisposes; low humidity advised *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Gerbils with nasal dermatitis first show redness (erythema) around the external nostrils. [7] ### Gerbil neoplasia: high spontaneous tumor incidence (25–40%) in gerbils over 2–3 years old *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > In laboratory colonies of Mongolian gerbils, spontaneous tumours are common: 25–40% of animals older than 2–3 years develop neoplasia (Merck cites references 15 and 16). [7] ### Gerbil seizure predisposition: reflex epileptiform seizures in genetically susceptible animals *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Some gerbils inherit a predisposition to reflex epilepsy and show repeated clonic-tonic (stereotypical epileptiform) seizures beginning at about 2 months of age. [7] > Frequent gentle handling during the first 3 weeks of life can suppress seizures in genetically predisposed gerbils. [7] ## Toxicology & Hazards Substances and environmental hazards to avoid. ### Fatal penicillin-dihydrostreptomycin toxicosis in Mongolian gerbils *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Mongolian gerbils can suffer fatal acute toxicosis after an injection of a penicillin–dihydrostreptomycin–procaine combination. [8] > The dihydrostreptomycin component is the cause: 50 mg produces almost 100% mortality in adult gerbils. [8] ### Gerbil toxic / harmful foods — grapes and rhubarb poisonous to rodents; limit fatty seeds *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Grapes and rhubarb are poisonous to rodents and must not be fed to gerbils. [3] > Excessive amounts of fatty seeds such as sunflower seeds can cause obesity and should be limited. [3] > *[Paraphrased derived summary — non-Open-Access source.]* Do not feed grapes or rhubarb, which are poisonous to rodents; avoid excessive sunflower seeds and other fatty seeds, as these can cause obesity. [3] > *[Paraphrased derived summary — non-Open-Access source.]* Safe branches for gnawing include willow, hazel, beech, birch and fruit-tree branches; do not give ivy, yew or holly, which are poisonous. [6] ## Grooming Brushing / bathing, nails, coat / skin and dental care. ### Gerbil — grooming (owner-practical care, Merck Veterinary Manual pet-owner) *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > A clean environment and a high-quality commercial diet formulated for gerbils help keep the pet healthy. [2] > Fresh clean water should be provided daily. [2] > Water dispensers should be washed thoroughly each time they are refilled. [2] > A gerbil's incisor teeth grow continuously, so constant chewing and gnawing are needed to wear them down. [2] > Lifting a young gerbil's tail shows a small bare patch; on males this patch sits farther from the tail than on females, a useful sexing clue. [2] > Newborn pups can be lost or crushed under normal toys and exercise equipment. [2] > Choose a gerbil with smooth glossy fur, clear eyes and no obvious signs of trauma such as limping or hair loss on the body or tail. [2] ## Breeding & Neutering Neutering / spaying, reproduction and preventing unwanted litters. ### Gerbil — breeding (owner-practical care, Merck Veterinary Manual pet-owner) *All lines in this block are paraphrased derived summaries — non-Open-Access source.* > Gerbils are best kept in pairs, ideally same-sex siblings. [2] > Pregnancy lasts about 24 days and litters contain 1–8 pups. [2] > Ovarian cysts, common in older females, are a major cause of infertility and small litters. [2] > Gerbils care for their young instinctively, so owners need not intervene. [2] > Gestation lasts between 19 and 30 days. [1] ## Regulations & Legality Legality crosswalk lines for this species, where available. Jurisdiction-specific pet law is frequently a gap — see the roadmap. *⚠️ Incomplete — jurisdiction-specific pet-law data is still being collected. The lines below are unverified statute excerpts, not actionable legal guidance; treat them as honest gaps and consult the relevant authority.* ### Gerbil — species legality crosswalk (US/CA/FL named lists + EU/JP/CITES framework) > The most common examples are ferrets, hedgehogs, sugar gliders, gerbils, monkeys, and monk parakeets. ## Appendix A — Commercial Food & Regulatory Notes How pet-food regulatory standards treat this species (reference material, demoted from the main flow). ### Exotic / specialty pet food — AAFCO recognizes no nutrient profiles for exotics; standards defer to NRC species reports > As an AAFCO-recognized nutrient profile or nutritional authority: [9] > For dogs, the AAFCO Dog Food Nutrient Profiles; [9] > For cats, the AAFCO Cat Food Nutrient Profiles; [9] > For specialty pets, the nutrient recommendations approved by the Committee on Animal Nutrition of the National Research Council of the National Academy of Sciences [9] ## Appendix B — Research Evidence Peer-reviewed papers indexed for this species (reference material). Entries whose abstract did not mention the species by name, or were flagged off-topic at source, were omitted as likely mis-clustered. ### Evidence cluster — Gerbil (Meriones unguiculatus) husbandry, health & nutrition (peer-reviewed, Europe PMC) > **PMID 41754451 (2026, Pathogens (Basel, Switzerland))** — *[Paraphrased derived summary — non-Open-Access source.]* Using the nonpermissive Mongolian gerbil, researchers compared intraperitoneal infection with Brugia malayi (permissive control) versus Dirofilaria immitis third-stage larvae. D. immitis recovery was only 0.4% at day 1 versus 37.4% for B. malayi, rose to 23.6% by day 3 (suggesting transient tissue residence during the third molt), then fell; by day 36 B. malayi reached the immature adult stage (15.2%) while no viable D. immitis were recovered, indicating a robust macrophage-dominated response after the molt blocks establishment and explaining filarial host specificity. [10] ## References [1] https://animaldiversity.org/accounts/Meriones_unguiculatus/ *grade B: T3 professional reference, verbatim (computed per docs/topic_grading_guide.md §4)* [2] https://www.merckvetmanual.com/all-other-pets *grade B: T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)* [3] https://www.rspca.org.uk/adviceandwelfare/pets/rodents/gerbils/diet *grade C: T4 expert organisation, paraphrase (computed per docs/topic_grading_guide.md §4)* [4] https://www.merckvetmanual.com/exotic-and-laboratory-animals *grade B: T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)* [5] https://veterinarypartner.vin.com/default.aspx?pid=19239&catId=254109&id=4952897 *grade B: T3 professional reference, verbatim (computed per docs/topic_grading_guide.md §4)* [6] https://www.rspca.org.uk/adviceandwelfare/pets/rodents/gerbils/health *grade C: T4 expert organisation, paraphrase (computed per docs/topic_grading_guide.md §4)* [7] https://www.merckvetmanual.com/exotic-and-laboratory-animals/rodents/gerbils *grade B: T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)* [8] https://www.merckvetmanual.com/ *grade B: T2 peer-reviewed/T3 professional reference, paraphrase (computed per docs/topic_grading_guide.md §4)* [9] AAFCO — Dog / Cat / Specialty-Pet Food Nutrient Profiles (NRC for specialty pets) — https://www.aafco.org/ *grade A: T1 government/standard, verbatim (computed per docs/topic_grading_guide.md §4)* [10] https://pubmed.ncbi.nlm.nih.gov/41754451/ *grade B: T2 peer-reviewed, paraphrase (computed per docs/topic_grading_guide.md §4)* ## Supplement Data Roadmap *Known gaps in this manual, machine-checked against the published text on every build; an item appears only while the gap is still real.* - **Regulations & Legality depth**: only 1 verified legality line(s) so far — coverage is still being collected; consult your local authority before relying on this section. - **Root-domain reference(s)**: https://www.merckvetmanual.com/, https://www.aafco.org/ — these point to a source home page rather than the exact page; being fixed.