{"topic_id":"FDA_DCM_investigation_timeline_2014_2024","category":"dcm","context":"---\ntopic_id: FDA_DCM_investigation_timeline_2014_2024\ncategory: dcm\ntitle: FDA DCM investigation timeline 2014-2024 — grain-free + pulse-rich diet signal, Vet-LIRN cases, diet-change recovery pattern\nlang: en\nsource: 3 FDA official docs (Tavily extract; Akamai blocked direct curl)\ndate_parsed: 2026-07-20\ntokens_estimated: 660\n---\n\nFDA's official public record on diet-associated dilated\ncardiomyopathy (DCM) in dogs, 2014-2024. Sourced from three\nofficial FDA documents extracted via Tavily (Akamai bot\ndetection blocked direct curl access from Tokyo VPS).\n\n## Documents extracted (3 official sources)\n\n| # | Title | Date | URL |\n|---|-------|------|-----|\n| 1 | FDA Outbreaks: DCM Investigation (consumer-facing page) | last updated 2022 | fda.gov/animal-veterinary/outbreaks-and-advisories/fda-investigation-potential-link-between-certain-diets-and-canine-dilated-cardiomyopathy |\n| 2 | FDA Vet-LIRN Update on Investigation into Dilated Cardiomyopathy | 2019-04-30 cutoff | fda.gov/animal-veterinary/science-research/vet-lirn-update-investigation-dilated-cardiomyopathy |\n| 3 | FDA KSU Science Forum slides | 2020-09-29 | ksvdl.org/.../FDA_KSU-Science-Forum-slides_09-29-2020.pdf |\n\n## Timeline\n\n| Year | Event |\n|------|-------|\n| 2014 | 1 early case report (different profile from later) |\n| early 2015 | FDA begins receiving DCM cases suspected diet-related |\n| 2018 (uptick) | Sharp increase in well-documented cases |\n| 2018-07-12 | **First FDA CVM Update** — public announcement of investigation |\n| 2019-02-19 | Follow-up update |\n| 2019-04-30 | Vet-LIRN data cutoff (340 dogs, 9 cats reviewed) |\n| 2019-06-27 | Follow-up update |\n| 2019-11 → 2020-07 | \"Group Two\" cases (5 full + 30 partial recovery) |\n| 2020-09-29 | KSU Science Forum (FDA presentation): >1100 cases reported, >150 Vet-LIRN investigated |\n| 2022-11-01 | FDA added count of reports as of Nov 1 2022 (page later retired) |\n| ~2022-2024 | FDA ends routine public updates (per AVMA) |\n\n## Diet characteristics (FDA analysis, 1/1/2014–4/30/2019)\n\n| Characteristic | % of reported products |\n|----------------|----------------------:|\n| Grain-free (no corn/soy/wheat/rice/barley/other grains) | **91%** |\n| Peas and/or Lentils (incl. chickpeas, beans) | **93%** |\n| Peas | 89% |\n| Lentils | 62% |\n| Potatoes / Sweet Potatoes | 42% |\n\n**Animal proteins in reported diets**: chicken, lamb, fish most\ncommon; atypical sources included kangaroo, bison, duck. No\nsingle animal protein source was predominant.\n\n## Vet-LIRN data (as of 2019-04-30)\n\n| Metric | Count |\n|--------|------:|\n| Gross necropsies reviewed | 19 (13 from FDA Safety Reporting Portal + 1 pending) |\n| Gross heart examinations completed | 13 |\n| Tissues collected for histopathology | 10/13 necropsies (liver, kidney, gastrocnemius, eye, lung, spleen) |\n| Medical records reviewed | 340 dogs + 9 cats |\n| Confirmed DCM | **202 dogs + 6 cats** |\n| Dogs progressing to CHF | 61% (n=123) |\n| Cats progressing to CHF | 100% (n=6) |\n| Valvular degeneration (dogs) | 15% (n=32) |\n| Atrial fibrillation (dogs) | 12% (n=24) |\n| Dogs with allergies/sensitivities history | 38% (n=77) |\n\n## Vet-LIRN case investigation groups (KSU Forum 2020)\n\n| Group | Period | Count | Recovery |\n|-------|--------|------:|----------|\n| Group One | 2018-01 → 2019-04 | 121 dogs | **107 fully or partial recovery** |\n| Group Two | 2019-11 → 2020-07 | (subset) | 5 full recovery + 30 partial recovery |\n| **Total reported to FDA** | through 2020-09 | >1,100 | — |\n| **Vet-LIRN investigated** | through 2020-09 | >150 | — |\n\n**Recovery pattern**: Cardiac function (LV systolic function,\nLVIDd normalization) improved after discontinuing reported\ndiets + medical treatment. 96% of recovery diets in Group\nOne were grain-containing (only 3 were hydrolyzed protein:\n2 corn starch, 1 brewer's rice).\n\n## Doberman Pinscher case example (Vet-LIRN)\n\nTwo 4-year-old Doberman Pinscher littermates (1 castrated\nmale, 1 spayed female) on grain-free poultry+egg diet for\n~2 years:\n- Male: presented first with dyspnea, weight loss, cough →\n  congestive heart failure → furosemide + pimobendan →\n  DCM confirmed by echocardiogram → enalapril + spironolactone\n- Female: concurrent presentation, slight hyporexia →\n  occult DCM → treated with same regimen\n- Both improved after diet change to grain-inclusive\n\n## End of routine updates (~2022)\n\nFDA ended routine public updates on the investigation\n(per AVMA news, 2022). The official page remained accessible\nthrough 2022 with a Nov 1 2022 case count, but was later\nretired from public domain (404 as of 2026-07-20).\n\n## Access methodology note\n\nDirect curl from Tokyo VPS (206.237.120.227) to fda.gov is\n**blocked by Akamai Bot Manager** (302 → abuse-detection-apology.html,\neven with full Chrome 126 user-agent + cookie jar). Wayback\nMachine CDX has **zero cardiomyopathy snapshots** (FDA\nrobots.txt blocks crawlers). Tavily extract works because\nit routes through a different IP class than direct VPS\naccess.\n\n## Source documents\n\n| Title | URL |\n|-------|-----|\n| FDA DCM Investigation page | fda.gov/animal-veterinary/outbreaks-and-advisories/fda-investigation-potential-link-between-certain-diets-and-canine-dilated-cardiomyopathy |\n| FDA Vet-LIRN Update | fda.gov/animal-veterinary/science-research/vet-lirn-update-investigation-dilated-cardiomyopathy |\n| FDA KSU Forum slides 2020-09-29 | ksvdl.org/resources/documents/dcm-forum/FDA_KSU-Science-Forum-slides_09-29-2020.pdf |\n| AVMA (FDA end of updates) | avma.org/news/until-more-science-available-fda-will-end-public-updates-potential-link-between-certain-diets |\n\nSource: `recalls/fda-dcm-source.json` (3 docs extracted via\nTavily on 2026-07-20).","sources":[],"tokens_estimated":660,"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."}