Total Reports
7,526
FDA CVM filings
Dog /
FDA CVM · 2025 release 7,526 reports on file
Terrier - Boston - FDA Adverse Event Profile
Adverse-event records for Terrier - Boston (Dog) from the FDA Center for Veterinary Medicine.
Data updated June 2026
The record at a glance
Among dog breeds, Terrier - Boston is #28 by FDA report volume; 4.6% of its 7,526 reports (345) were death-coded.
- #28
- most-reported dog breed
- 4.6%
- death-coded report share
- 1,594
- Vomiting - top reaction
- 5.7 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
345
of 7,526 reports
Death Rate
4.6%
death-coded share
Avg Age at Report
5.7 yr
10.2 kg avg weight
Death-Coded Outcome Share
Terrier - Boston death-coded reports 4.6%
Cross-breed median
4.6% of 7,526 terrier - boston 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: 10.2 kg (22.5 lbs)
Top Reported Reactions
Vomiting 1,594
Emesis 831
Lethargy (see also Central nervous system depression in 'Neurological') 674
Diarrhoea 550
Lack of efficacy (endoparasite) - hookworm 435
Lack of efficacy - NOS 403
Seizure NOS 370
Lack of efficacy (ectoparasite) - flea 316
INEFFECTIVE, HEARTWORM LARVAE 265
Anorexia 238
Digestive tract disorder NOS 237
Lack of efficacy (endoparasite) - heartworm 236
Other abnormal test result NOS 220
Elevated alanine aminotransferase (ALT) 213
Behavioural disorder NOS 184
Most Referenced Drugs
Milbemycin Oxime + Spinosad 1,571
Trilostane 646
Ivermectin + Pyrantel As Pamoate Salt 639
Spinosad 555
Moxidectin 431
Afoxolaner 371
Oclacitinib Maleate 365
Pyrantel Pamoate;Sarolaner 322
Fluralaner Chew Tablets 298
Milbemycin Oxime + Praziquantel 224
Fluralaner 13.64% 12-Week Chew 149
Carprofen 139
Sarolaner 131
Selamectin 119
Maropitant Citrate 117
Outcome Breakdown
Recovered/Normal
2,580 (37.2%)
Outcome Unknown
2,152 (31.0%)
Ongoing
1,608 (23.2%)
Recovered with Sequela
257 (3.7%)
Died
187 (2.7%)
Euthanized
158 (2.3%)
Gender Distribution
Female 3,694 (49.1%)
Male 3,669 (48.8%)
Unknown 145 (1.9%)
Mixed 18 (0.2%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2010 | 298 | |
| 2011 | 433 | |
| 2012 | 618 | |
| 2013 | 629 | |
| 2014 | 594 | |
| 2015 | 562 | |
| 2016 | 517 | |
| 2017 | 580 | |
| 2018 | 479 | |
| 2019 | 560 | |
| 2020 | 451 | |
| 2021 | 406 | |
| 2022 | 370 | |
| 2023 | 398 | |
| 2024 | 379 | |
| 2025 | 252 | |
Terrier - Boston Pet Health Insights
Terrier - Boston accounts for 7,526 FDA adverse event reports, ranking #28 by volume among dog breeds, with 345 reports (4.6%) coded as a death outcome. Mean age at report: 5.7 years, average weight 10.2 kg (22.5 lbs).
Top reported signs: Vomiting (1,594), Emesis (831), Lethargy (see also Central nervous system depression in 'Neurological') (674). Most-referenced drug: Milbemycin Oxime + Spinosad (1,571 reports), followed by Trilostane (646) and Ivermectin + Pyrantel As Pamoate Salt (639).
Outcome coding on 6,942 status-recorded reports is dominated by Recovered/Normal (37.2%). Annual submissions ranged 2,010-2,025 across 16 years on file.
Dog Breeds With a Similar Report Volume
Spaniel - Cocker American
7,534 reports · 4.0% death rate
Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog)
7,541 reports · 3.6% death rate
Schnauzer - Miniature
7,307 reports · 4.4% death rate
Bulldog
7,270 reports · 4.8% death rate
Poodle (unspecified)
7,250 reports · 3.5% death rate
Bichon Frise
6,966 reports · 3.8% death rate
Frequently Asked Questions
How many FDA adverse event reports involve Terrier - Boston? ▼
There are 7,526 adverse event reports involving Terrier - Boston in the FDA database, with 345 reports involving death (4.6% death rate). Terrier - Boston ranks #28 by report volume.
What are the most common adverse reactions reported for Terrier - Boston? ▼
The most commonly reported adverse reactions for Terrier - Boston are Vomiting (1,594 reports), Emesis (831 reports), Lethargy (see also Central nervous system depression in 'Neurological') (674 reports), Diarrhoea (550 reports), Lack of efficacy (endoparasite) - hookworm (435 reports).
What drugs are most frequently associated with Terrier - Boston adverse events? ▼
The drugs most frequently referenced in Terrier - Boston adverse event reports are Milbemycin Oxime + Spinosad (1,571 reports), Trilostane (646 reports), Ivermectin + Pyrantel As Pamoate Salt (639 reports), Spinosad (555 reports), Moxidectin (431 reports).
What is the average age of Terrier - Boston in adverse event reports? ▼
The average age of Terrier - Boston at the time of adverse event reports is 5.7 years, with an average weight of 10.2 kg (22.5 lbs).
Does a high number of adverse event reports mean Terrier - Boston 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 - Boston 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.