Total Reports
10,210
FDA CVM filings
Dog /
FDA CVM · 2025 release 10,210 reports on file
Terrier - Jack Russell - FDA Adverse Event Profile
Adverse-event records for Terrier - Jack Russell (Dog) from the FDA Center for Veterinary Medicine.
Data updated June 2026
The record at a glance
With 10,210 reports on file, Terrier - Jack Russell sits at #18 among dog breeds by volume; death-coded share is 3.7% (375 reports).
- #18
- most-reported dog breed
- 3.7%
- death-coded report share
- 2,152
- Vomiting - top reaction
- 6.8 yr
- average age at report
Read report counts next to breed popularity: a bigger number often just means more owners and more vet visits.
Deaths Reported
375
of 10,210 reports
Death Rate
3.7%
death-coded share
Avg Age at Report
6.8 yr
8.6 kg avg weight
Death-Coded Outcome Share
Terrier - Jack Russell death-coded reports 3.7%
Cross-breed median
3.7% of 10,210 terrier - jack russell reports involved a death outcome.
How to read this number
Read alongside breed popularity, veterinary access, and owner awareness, these shape how many events ever reach the FDA. The comparison line marks the cross-breed median death-coded share (about 4.8%) among breeds with 50 or more reports; values above it suggest higher reporting bias toward severe outcomes, not necessarily higher true mortality.
Average weight at time of report: 8.6 kg (19.0 lbs)
Top Reported Reactions
Vomiting 2,152
Lethargy (see also Central nervous system depression in 'Neurological') 1,033
Emesis 1,013
Lack of efficacy (ectoparasite) - flea 957
Diarrhoea 676
Lack of efficacy - NOS 603
INEFFECTIVE, HEARTWORM LARVAE 478
Lack of efficacy (endoparasite) - hookworm 439
Seizure NOS 435
Lack of efficacy (endoparasite) - heartworm 432
Anorexia 350
Pruritus 282
Behavioural disorder NOS 280
Digestive tract disorder NOS 261
Shaking 252
Most Referenced Drugs
Milbemycin Oxime + Spinosad 2,175
Spinosad 1,043
Ivermectin + Pyrantel As Pamoate Salt 872
Afoxolaner 641
Moxidectin 488
Fluralaner Chew Tablets 442
Oclacitinib Maleate 424
Pyrantel Pamoate;Sarolaner 384
Trilostane 312
Milbemycin Oxime + Praziquantel 264
Fluralaner 13.64% 12-Week Chew 221
Nitenpyram 201
Sarolaner 198
Carprofen 195
Selamectin 154
Outcome Breakdown
Recovered/Normal
3,261 (35.1%)
Outcome Unknown
3,155 (34.0%)
Ongoing
2,081 (22.4%)
Recovered with Sequela
407 (4.4%)
Died
194 (2.1%)
Euthanized
181 (2.0%)
Gender Distribution
Male 5,123 (50.2%)
Female 4,856 (47.6%)
Unknown 206 (2.0%)
Mixed 25 (0.2%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2010 | 505 | |
| 2011 | 675 | |
| 2012 | 854 | |
| 2013 | 839 | |
| 2014 | 817 | |
| 2015 | 913 | |
| 2016 | 864 | |
| 2017 | 780 | |
| 2018 | 680 | |
| 2019 | 627 | |
| 2020 | 575 | |
| 2021 | 482 | |
| 2022 | 415 | |
| 2023 | 448 | |
| 2024 | 449 | |
| 2025 | 287 | |
Terrier - Jack Russell Pet Health Insights
Terrier - Jack Russell accounts for 10,210 FDA adverse event reports, ranking #18 by volume among dog breeds, with 375 reports (3.7%) coded as a death outcome. Mean age at report: 6.8 years, average weight 8.6 kg (19.0 lbs).
Top reported signs: Vomiting (2,152), Lethargy (see also Central nervous system depression in 'Neurological') (1,033), Emesis (1,013). Most-referenced drug: Milbemycin Oxime + Spinosad (2,175 reports), followed by Spinosad (1,043) and Ivermectin + Pyrantel As Pamoate Salt (872).
Outcome coding on 9,279 status-recorded reports is dominated by Recovered/Normal (35.1%). Annual submissions ranged 2,010-2,025 across 16 years on file.
Dog Breeds With a Similar Report Volume
Collie - Border
9,801 reports · 4.3% death rate
Siberian Husky
9,399 reports · 4.4% death rate
Pug
9,020 reports · 5.1% death rate
Spitz - German Pomeranian
8,853 reports · 5.0% death rate
Terrier - Bull - American Pit
8,232 reports · 4.5% death rate
Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog)
7,541 reports · 3.6% death rate
Frequently Asked Questions
How many FDA adverse event reports involve Terrier - Jack Russell? ▼
There are 10,210 adverse event reports involving Terrier - Jack Russell in the FDA database, with 375 reports involving death (3.7% death rate). Terrier - Jack Russell ranks #18 by report volume.
What are the most common adverse reactions reported for Terrier - Jack Russell? ▼
The most commonly reported adverse reactions for Terrier - Jack Russell are Vomiting (2,152 reports), Lethargy (see also Central nervous system depression in 'Neurological') (1,033 reports), Emesis (1,013 reports), Lack of efficacy (ectoparasite) - flea (957 reports), Diarrhoea (676 reports).
What drugs are most frequently associated with Terrier - Jack Russell adverse events? ▼
The drugs most frequently referenced in Terrier - Jack Russell adverse event reports are Milbemycin Oxime + Spinosad (2,175 reports), Spinosad (1,043 reports), Ivermectin + Pyrantel As Pamoate Salt (872 reports), Afoxolaner (641 reports), Moxidectin (488 reports).
What is the average age of Terrier - Jack Russell in adverse event reports? ▼
The average age of Terrier - Jack Russell at the time of adverse event reports is 6.8 years, with an average weight of 8.6 kg (19.0 lbs).
Does a high number of adverse event reports mean Terrier - Jack Russell is unhealthy? ▼
No. FDA adverse event reports are voluntarily submitted and do not prove causation. Popular breeds with more veterinary visits tend to have more reports. The data reflects reporting patterns, not actual incidence rates. Always consult a veterinarian for health decisions.
Where does this Terrier - Jack Russell safety data come from? ▼
All data comes from the FDA Center for Veterinary Medicine's adverse event reporting system. Pet owners, veterinarians, and manufacturers voluntarily submit reports about adverse events potentially linked to animal drugs and other products.
Compare a breed's report volume against how common the breed is before drawing conclusions. See our methodology for how death rate and rankings are computed.
Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. Breed figures are computed directly from FDA openFDA data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.