{"topic_id":"evidence_equine_respiratory_heaves_diet","category":"evidence","context":"---\ntopic_id: evidence_equine_respiratory_heaves_diet\ncategory: evidence\ntitle: \"Horse — recurrent airway obstruction (heaves) / equine asthma — dietary management (Europe PMC)\"\nlang: en\nsource: \"Europe PMC REST search (europepmc.org), query '(horse OR equine) AND (heaves OR recurrent airway obstruction OR equine asthma OR respiratory) AND (diet OR nutrition OR feeding OR management)', 31259 hits, pulled 2026-07-22\"\nsource_file: pdf-raw/evidence/europepmc_evidence_equine_respiratory_heaves_diet_2026-07-22.txt\ndate_parsed: 2026-07-22\ntokens_estimated: 260\nverification:\n  method: paraphrase\n  claims: 4\n  passed: 4\n  date: 2026-07-22\nsource_document: \"Veterinary / medical evidence (guideline or study) — PMID 42278060\"\ncitation:\n  authority: \"Europe PMC\"\n  title: \"Horse — recurrent airway obstruction (heaves) / equine asthma — dietary management (Europe PMC)\"\n  url: \"https://pubmed.ncbi.nlm.nih.gov/42278060/\"\n  retrieved: \"2026-07-22\"\n  ref: \"PMID 42278060\"\n  doc_type: \"official PDF\"\n  needs_review: false\ncopyright_note: \"Mixed licensing per COPYRIGHT_POLICY §3: Open Access (CC BY) studies retained verbatim with attribution; non-Open-Access studies paraphrased as derived fact summaries (numbers and proper nouns preserved, sentences rewritten).\"\nlicense: mixed\nauthority_tier: T2\nauthority_tier_basis: \"T2:oa-repo\"\nauthority_tier_date: 2026-08-04\n---\n\n# Horse — recurrent airway obstruction (heaves) / equine asthma — dietary management (Europe PMC)\nSource: Europe PMC (Europe PubMed Central) REST search, query \"(horse OR equine) AND (heaves OR recurrent airway obstruction OR equine asthma OR respiratory) AND (diet OR nutrition OR feeding OR management)\", 31259 hits (2026-07-22). Each entry is a first-hand peer-reviewed study; the abstract opening is quoted verbatim. 4 representative studies below (filtered for species + nutrition relevance).\n\n1. PMID 42278060 — The Role of Omega-3 Fatty Acids in Horses' Nutrition-A Review. (Animals : an open access journal from MDPI, 2026). Abstract (opening): This narrative review presents examples of omega-3 fatty acids supplementation in horse nutrition. Fats are essential in equine nutrition, serving not only as an energy source but  *[CC BY — Open Access, verbatim with attribution.]*\n2. PMID 40923556 — Steamed hay for the prevention of severe equine asthma exacerbations. (Equine veterinary journal, 2026). Abstract (opening): Steaming hay reduces respirable particles and is commonly used to feed horses with asthma. However, it showed inconsistent benefits in clinical studies. (1) To assess the effects o *[CC BY — Open Access, verbatim with attribution.]*\n3. PMID 41187975 — *[Paraphrased derived summary — non-Open-Access source.]* Field-applicable low-intensity exercise induced bronchodilation in horses with severe equine asthma (SEA); airway dysfunction in SEA often leads to early retirement or euthanasia, and exercise-induced bronchodilation was observed (Equine Vet J, 2025). (Source excerpt truncated at abstract opening.)\n4. PMID 42232726 — Airborne dust and microorganisms from hay produced on intensively and extensively managed grasslands in Switzerland. (Veterinary and animal science, 2026). Abstract (opening): Hay is a key component of equine nutrition, supplying fibre essential for gastrointestinal function and natural chewing behavior. However, it is also a major source of respirable d *[CC BY — Open Access, verbatim with attribution.]*\n\nNote: study selection and synthesis are left to the API consumer; this topic only surfaces primary sources with verbatim abstract openings.\n\nSource text: `pdf-raw/evidence/europepmc_evidence_equine_respiratory_heaves_diet_2026-07-22.txt` (Europe PMC REST + PubMed efetch, 2026-07-22).\n\n## License & attribution\n\nMixed licensing per COPYRIGHT_POLICY §3: Open Access (CC BY / CC BY-NC /\nCC BY-NC-ND) studies are reproduced verbatim with attribution under their specific\nCC license; non-Open-Access studies are paraphrased as derived fact summaries\n(numbers and proper nouns preserved, sentences rewritten). Original records:\n- https://pubmed.ncbi.nlm.nih.gov/42278060/\n- https://pubmed.ncbi.nlm.nih.gov/40923556/\n- https://pubmed.ncbi.nlm.nih.gov/41187975/\n- https://pubmed.ncbi.nlm.nih.gov/42232726/\n\n## Cleaning removal log (2026-08-05, codebuddy)\nPMID 42207732 — Human-focused review of asthma phenotypes and comorbidities — human subject, no equine/heaves content; self-labeled off-topic mis-cluster\nPMID 42464261 — Human study of aspartame immunomodulatory effects on airway inflammation in asthma — human subject, not equine heaves; self-labeled off-topic mis-cluster\n","sources":["Europe PMC — Horse — recurrent airway obstruction (heaves) / equine asthma — dietary management (Europe PMC) (retrieved 2026-07-22)"],"source":{"authority":"Europe PMC","title":"Horse — recurrent airway obstruction (heaves) / equine asthma — dietary management (Europe PMC)","url":"https://pubmed.ncbi.nlm.nih.gov/42278060/","retrieved":"2026-07-22","ref":"PMID 42278060","doc_type":"official PDF","source_document":"Veterinary / medical evidence (guideline or study) — PMID 42278060","verification_file":"pdf-raw/evidence/europepmc_evidence_equine_respiratory_heaves_diet_2026-07-22.txt"},"source_document":"Veterinary / medical evidence (guideline or study) — PMID 42278060","source_file":"pdf-raw/evidence/europepmc_evidence_equine_respiratory_heaves_diet_2026-07-22.txt","trust":{"authority_tier":"T2","fidelity":"paraphrase","license":"mixed","display_grade":"B"},"tokens_estimated":260,"generated_at":null,"tip":"Use /api/v1/topics to discover more topics. /api/v1/nutrient for precise single-point queries. /api/v1/cross_compare for 2-3 standard comparisons."}