Total Reports
142
FDA CVM filings
Dog /
FDA CVM · 2025 release 142 reports on file
Terrier - Norfolk - FDA Adverse Event Profile
Adverse-event records for Terrier - Norfolk (Dog) from the FDA Center for Veterinary Medicine.
Data updated June 2026
The record at a glance
Among dog breeds, Terrier - Norfolk is #211 by FDA report volume; 2.8% of its 142 reports (4) were death-coded.
- #211
- most-reported dog breed
- 2.8%
- death-coded report share
- 35
- Vomiting - top reaction
- 6.2 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
4
of 142 reports
Death Rate
2.8%
death-coded share
Avg Age at Report
6.2 yr
7.0 kg avg weight
Death-Coded Outcome Share
Terrier - Norfolk death-coded reports 2.8%
Cross-breed median
2.8% of 142 terrier - norfolk 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: 7.0 kg (15.4 lbs)
Top Reported Reactions
Vomiting 35
Lethargy (see also Central nervous system depression in 'Neurological') 21
Emesis 16
Diarrhoea 15
Lack of efficacy (ectoparasite) - flea 13
Lack of efficacy - NOS 7
Lack of efficacy (endoparasite) - hookworm 6
Shaking 6
Most Referenced Drugs
Milbemycin Oxime + Spinosad 37
Spinosad 15
Ivermectin + Pyrantel As Pamoate Salt 11
Fluralaner 13.64% 12-Week Chew 11
Afoxolaner 8
Fluralaner Chew Tablets 6
Pyrantel Pamoate;Sarolaner 6
Oclacitinib Maleate 5
Outcome Breakdown
Recovered/Normal
68 (50.4%)
Outcome Unknown
35 (25.9%)
Ongoing
24 (17.8%)
Recovered with Sequela
4 (3.0%)
Euthanized
3 (2.2%)
Died
1 (0.7%)
Gender Distribution
Male 74 (52.1%)
Female 64 (45.1%)
Unknown 3 (2.1%)
Mixed 1 (0.7%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2010 | 3 | |
| 2011 | 6 | |
| 2012 | 10 | |
| 2013 | 11 | |
| 2014 | 15 | |
| 2015 | 15 | |
| 2016 | 11 | |
| 2017 | 11 | |
| 2018 | 11 | |
| 2019 | 7 | |
| 2020 | 6 | |
| 2021 | 7 | |
| 2022 | 9 | |
| 2023 | 6 | |
| 2024 | 9 | |
| 2025 | 5 | |
Terrier - Norfolk Pet Health Insights
Terrier - Norfolk accounts for 142 FDA adverse event reports, ranking #211 by volume among dog breeds, with 4 reports (2.8%) coded as a death outcome. Mean age at report: 6.2 years, average weight 7.0 kg (15.4 lbs).
Top reported signs: Vomiting (35), Lethargy (see also Central nervous system depression in 'Neurological') (21), Emesis (16). Most-referenced drug: Milbemycin Oxime + Spinosad (37 reports), followed by Spinosad (15) and Ivermectin + Pyrantel As Pamoate Salt (11).
Outcome coding on 135 status-recorded reports is dominated by Recovered/Normal (50.4%). Annual submissions ranged 2,010-2,025 across 16 years on file.
Dog Breeds With a Similar Report Volume
Dogue de Bordeaux
141 reports · 6.4% death rate
Terrier - Australian
149 reports · 2.7% death rate
Spitz (unspecified)
150 reports · 1.3% death rate
Collie - Smooth-haired
152 reports · 11.2% death rate
Dachshund - Standard Wire-haired
152 reports · 2.6% death rate
Spaniel - Springer Welsh
155 reports · 3.2% death rate
Frequently Asked Questions
How many FDA adverse event reports involve Terrier - Norfolk? ▼
There are 142 adverse event reports involving Terrier - Norfolk in the FDA database, with 4 reports involving death (2.8% death rate). Terrier - Norfolk ranks #211 by report volume.
What are the most common adverse reactions reported for Terrier - Norfolk? ▼
The most commonly reported adverse reactions for Terrier - Norfolk are Vomiting (35 reports), Lethargy (see also Central nervous system depression in 'Neurological') (21 reports), Emesis (16 reports), Diarrhoea (15 reports), Lack of efficacy (ectoparasite) - flea (13 reports).
What drugs are most frequently associated with Terrier - Norfolk adverse events? ▼
The drugs most frequently referenced in Terrier - Norfolk adverse event reports are Milbemycin Oxime + Spinosad (37 reports), Spinosad (15 reports), Ivermectin + Pyrantel As Pamoate Salt (11 reports), Fluralaner 13.64% 12-Week Chew (11 reports), Afoxolaner (8 reports).
What is the average age of Terrier - Norfolk in adverse event reports? ▼
The average age of Terrier - Norfolk at the time of adverse event reports is 6.2 years, with an average weight of 7.0 kg (15.4 lbs).
Does a high number of adverse event reports mean Terrier - Norfolk 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 - Norfolk 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.