Reaction profile

The FDA adverse-event record for loose stool

8,484 FDA reports name loose stool, a high-volume reaction in the CVM extract (VeDDRA 304). Plate stamps and neighbourhood peers follow.

#52 of 2,481
by report volume (all reactions)
8,484
reports citing this reaction
6.0%
death-coded share
Dog
most-affected species

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Loose stool has 8,484 reports now versus 8,412 in that prior snapshot: 72 more (0.9%).

Report change
+72
Death-coded reports
+5
Death-coded share
+0.0 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Loose stool changes

FDA AER · VeDDRA plate

Code 304 VOL-HIGH

VOL-HIGH · DEATH-PAR · TOP-DECILE · PHOTO-FINISH · SPECIES-DOG · DRUG-LEAD · DESK-WIDE · BOOK-FULL

  • VOL-HIGH 8,484 reports
  • DEATH-PAR 6.0%
  • TOP-DECILE #52/2481
  • PHOTO-FINISH Product Defect, Gener…
  • SPECIES-DOG Dog · 7,521
  • DRUG-LEAD Milbemycin Oxime… · 973
  • DESK-WIDE 20 breeds
  • BOOK-FULL 8/8 fields

Nearest volume peer: Product Defect, General (±25 reports)

Upper-third report volume drives the scale stamps on this plate; death-coded share and co-report peers follow. Not a clinical diagnosis.

High-volume neighbourhood around Loose stool

Upper-third volume poles plus nearest peers, not a full reaction corpus board reprint.

Vomiting · highest174348Facial swelling (see… · near8541Loose stool · this reaction8484Product Defect, Gener… · near8459Hives (see also 'Skin… · near8336Lack of efficacy (fle… · near8320Urinary tract neoplas… · low…10
FDA AER report volume · neighbourhood around Loose stool

Loose stool: low death-coded share in the FDA AER plate

Signature read: 8,484 reports place Loose stool in the upper third of FDA AER volume (#52 of 2,481). Report volume is upper-third scale: 8,484 named reports in the openFDA extract. Death-coded share is lower-third: 513 of 8,484 reports (6.0% of named reports). Nearest volume peer: Product Defect, General (±25 reports). Lead species Dog (7,521). Lead co-reported drug Milbemycin Oxime + Spinosad (973).

Read these counts as reporting volume, not risk: per our methodology, Lead co-reported drug Milbemycin Oxime + Spinosad appears in filings alongside this reaction; that is association, not causation. Browse the full reactions index or the about page for how PlainBreed frames FDA CVM extracts.

Species Most Affected

Dog 7,521
Cat 665
Cattle 145
Horse 91
Pig 18
Human 18
Turkey 9
Rabbit 4
Chicken 3
Sheep 3

Breeds Most Affected

Retriever - Labrador 784
Crossbred Canine/dog 570
Retriever - Golden 386
Domestic Shorthair 351
Shepherd Dog - German 295
Terrier - Yorkshire 277
Chihuahua 265
Dog (unknown) 258
Shih Tzu 239
Boxer (German Boxer) 184

Associated Drugs

Milbemycin Oxime + Spinosad 973
Ivermectin + Pyrantel As Pamoate Salt 788
Afoxolaner 642
Milbemycin Oxime + Praziquantel 408
Carprofen 385
Fluralaner Chew Tablets 363
Trilostane 319
Pyrantel Pamoate;Sarolaner 318
Moxidectin 291
Maropitant Citrate 285
Oclacitinib Maleate 273
Grapiprant 248
Spinosad 236
Sarolaner 180
Gabapentin 178
Lotilaner 175
Fluralaner 13.64% 12-Week Chew 167
Metronidazole 166
Imidacloprid + Moxidectin 161
Prednisone 151

Nationwide reactions with similar profiles

Two openFDA-derived peer sets for Loose stool, both floored at ≥50 reports so the neighborhoods stay in the advertised mass (the volume chart above is the unfloored photo-finish strip).

Similar death-coded share

Nearest other reactions by death-coded share (6.0% here), distinct from the volume row.

What to do with this reaction

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Loose stool (#52 of 2,481 by report volume); death-coded 6.0%. PlainBreed reaction plate · report volume stamp 8,484 · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →