Evidence: dietary fiber and gut health in dogs (peer-reviewed, PubMed)
Source: PubMed/Europe PMC — first-hand peer-reviewed abstract records, pulled 2026-07-23. 6 representative studies are extracted below. Abstract text is verbatim from source; each study is traceable by PMID.
Studies
- PMID 42188886 (2026, Veterinary sciences) — Effects of a Novel Prebiotic and Postbiotic Dietary Supplement on Gut Microbiota, Intestinal Barrier Markers, and Inflammation in Healthy Dogs.. Although prebiotics and postbiotics support gastrointestinal health, evidence for their combined effects in dogs remains limited. This study evaluated a novel prebiotic and postbiotic supplement in healthy dogs undergoing a dietary transition. Thirty-six healthy adult dogs were randomly assigned to control group (CON, high-protein basal diet with placebo chew) or treatment group (TRT, the same bas
- PMID 41471872 (2025, Microorganisms) — Dietary Modulation of the Gut Microbiota in Dogs and Cats and Its Role in Disease Management.. Food has a massive influence on the gut microbiota and is one of the most useful therapeutic levers in disease. Recent developments have highlighted how macronutrient balance, food format, and functional ingredients can regulate microbial diversity, metabolism, and host physiology in companion animals such as dogs and cats. This narrative review condenses evidence on the bidirectional gut microbio
- PMID 42092959 (2026, BMC veterinary research) — Integrated effects of dietary supplementation of Spirulina platensis in working dogs: nutritional, biochemical, antioxidant, immunological, gut-related microbial and nutrigenomic insights.. <h4>Background</h4>The present study investigated the effects of daily dietary supplementation with Spirulina platensis powder at two inclusion levels (0.04 g and 0.08 g/kg body weight) for working dogs. Spirulina platensis is a nutrient-rich microalgae containing high-quality protein, vitamins, minerals, and antioxidant pigments. These constituents are reported to possess immunomodulatory, antiox
- PMID 41976013 (2026, Animals : an open access journal from MDPI) — Plant-Derived Functional Ingredients in Pet Nutrition: Phytochemical Classification, Mechanisms, Efficacy, and Application in Dogs and Cats.. This review classifies plant-derived functional ingredients in pet food according to phytochemical groups and application forms, including direct oral supplementation and incorporation into complete diets. Polyphenols and plant extracts exert prominent antioxidant (singular), anti-inflammatory, immunomodulatory, and microbiome-regulating effects. Microalgae and omega-3 sources support lipid metabo
- PMID 42358325 (2026, Frontiers in veterinary science) — Effects of a single-cell protein source from <i>Paecilomyces</i> var<i>iotii</i> on diet digestibility and palatability and intestinal functionality of adult dogs.. <h4>Introduction</h4>This study aimed to evaluate the effects of a single-cell protein (SCP) source from <i>Paecilomyces variotii</i> on the apparent total tract digestibility (ATTD) of macronutrients and energy, diet palatability, fecal fermentative metabolites, and microbiota in dogs.<h4>Materials and methods</h4>Five extruded diets containing 0, 4, 8, 12, and 16% of SCP were manufactured. To is
- PMID 41877915 (2026, Frontiers in veterinary science) — Beneficial effects of a prebiotic-postbiotic supplement on digestive health and fecal microbiota in dogs and cats.. Gastrointestinal (GI) disorders are a frequent concern for pet owners and veterinarians. Dietary management of mild GI disorders is often essential in order to correct imbalances in the gut flora. In this context, "biotics," including probiotics, prebiotics, and postbiotics, have received increasing attention for their potential to favorably modulate the gut microbiota and support digestive functi
Source text: pdf-raw/evidence/pubmed_canine_fiber_gut_diet_2026-07-23.txt (PubMed/Europe PMC first-hand abstracts, pulled 2026-07-23).