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Breed profile · FDA CVM July 2026 extract

Terrier - Norfolk adverse-event record

Adverse-event filings for Terrier - Norfolk (Dog) in the FDA Center for Veterinary Medicine openFDA extract. Browse dog breeds, reactions, and outcomes below.

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#214 of 510
by report volume (all breeds)
145
FDA CVM reports on file
2.8%
death-coded share of reports
#243 of 275
by death-coded share (≥50 reports)

How the 145 reports break down

By recorded gender -- every report on file for Terrier - Norfolk, no filtering.

Annual report volume

Annual adverse-event report trend Yearly FDA CVM adverse-event report counts for this breed. 9 6.75 4.5 2.25 0 2019 2020 2021 2022 2023 2024 2025 2026 Reports filed Death-coded reports
Annual report volume for Terrier - Norfolk drawn from FDA CVM filings.

Data updated September 2026

The verdict

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Terrier - Norfolk ranks #212 of 510 by total reports (145) and #243 of 275 by death-coded share (2.8%). National dual: Retriever - Labrador is #1 of 510 by total adverse-event reports (93,675) at death-coded-share rank 195 of 275 breeds with at least 50 reports (3.7%); separately, Atlantic Salmon (Salmo salar) is #1 highest death-coded share at 99.0% (report rank #233).

93,675
Retriever - Labrador reports (#1)
99.0%
Atlantic Salmon (Salmo salar) death share (#1)
#212
This breed, reports of 510
#243
This breed, death share of 275

Report volume reflects how common a breed or drug is and how often owners and vets file — not actual risk. Death-coded share ranks are limited to entries with enough reports to be meaningful. The two maps do not agree at #1.

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. Terrier - Norfolk has 145 reports now versus 142 in that prior snapshot: 3 more (2.1%).

Report change
+3
Death-coded reports
+0
Death-coded share
−0.1 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 Terrier - Norfolk changes

Total Reports

145

Above-median volume

Deaths Reported

4

of 145 reports

Death-coded share of reports

2.8%

Lowest death-coded share

Avg Age at Report

6.2 yr

7.1 kg avg weight

Death-Coded Outcome Share

Terrier - Norfolk death-coded reports 2.8%
Cross-breed median

2.8% of 145 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 (4.8%) among breeds with 50 or more reports; values above it suggest higher reporting bias toward severe outcomes, not necessarily higher true mortality.

Where Terrier - Norfolk's death-coded share sits among indexed breeds

Death-coded share of FDA CVM reports, breeds with ≥50 reports (July 2026 extract)

3% 12th percentile Higher share than 12% of 275 indexed breeds

5%–10%: 1 indexed breeds (0%). This entry sits in this band. 20%–25%: 2 indexed breeds (1%). Above this entry. 25%–30%: 3 indexed breeds (1%). Above this entry. 30%–35%: 4 indexed breeds (1%). Above this entry. 35%–40%: 5 indexed breeds (2%). Above this entry. 40%–45%: 6 indexed breeds (2%). Above this entry. 45%–50%: 3 indexed breeds (1%). Above this entry. 50%–55%: 7 indexed breeds (3%). Above this entry. 55%–60%: 7 indexed breeds (3%). Above this entry. 60%–65%: 21 indexed breeds (8%). Above this entry. 65%–70%: 11 indexed breeds (4%). Above this entry. 70%–75%: 15 indexed breeds (5%). Above this entry. 75%–80%: 13 indexed breeds (5%). Above this entry. 80%–85%: 11 indexed breeds (4%). Above this entry. 85%–90%: 12 indexed breeds (4%). Above this entry. 90%–95%: 12 indexed breeds (4%). Above this entry. 95%–100%: 142 indexed breeds (52%). Above this entry. Terrier - Norfolk 5% 100% every breed with ≥50 FDA reports, bucketed by value

Each bar is a band; taller bars hold more indexed breeds. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source FDA Center for Veterinary Medicine, openFDA adverse event extract (PlainBreed) · July 2026 extract

This histogram uses the same ≥50-report cohort as the highest death-coded share ranking. A higher share means more of this breed's reported events were death-coded, not a mortality rate for living animals.

Average weight at time of report: 7.1 kg (15.7 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
Pyrantel Pamoate;Sarolaner 7
Fluralaner Chew Tablets 6
Oclacitinib Maleate 5

Outcome Breakdown

Recovered/Normal
68 (49.3%)
Outcome Unknown
37 (26.8%)
Ongoing
25 (18.1%)
Recovered with Sequela
4 (2.9%)
Euthanized
3 (2.2%)
Died
1 (0.7%)

Gender Distribution

Male 76 (52.4%)
Female 65 (44.8%)
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 6
2026 2

Terrier - Norfolk: low death-coded share in the FDA CVM extract

Signature read: Terrier - Norfolk's 2.8% death-coded share is in the lower third of the ≥50-report cohort (median 4.8%). According to FDA CVM filings indexed on PlainBreed as of July 2026 extract, Terrier - Norfolk sits at #214 of 510 by report volume among all breeds and #162 of 298 among dog breeds, with 145 reports and 4 (2.8%) death-coded. On death-coded share among breeds with ≥50 reports, it ranks #243 of 275. Mean age at report: 6.2 years, average weight 7.1 kg (15.7 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 138 status-recorded reports is dominated by Recovered/Normal (49.3%). Annual submissions ranged 2-2,026 across 17 years on file.

Dog Breeds With a Similar Report Volume

Showing 6 of 297 dog breeds in our dataset, ranked by closest report volume.

Dogue de Bordeaux
146 reports · 6.2% death-coded
Sheepdog - Old English (Bobtail)
151 reports · 7.9% death-coded
Spitz (unspecified)
151 reports · 1.3% death-coded
Terrier - Australian
154 reports · 2.6% death-coded
Dachshund - Standard Wire-haired
156 reports · 2.6% death-coded
Collie - Smooth-haired
160 reports · 11.3% death-coded

Nationwide breeds with similar profiles

Two openFDA-derived peer sets for Terrier - Norfolk, both outside the Dog family so the neighborhoods are not species containment (the similar-volume list above stays within species).

Similar death-coded share

Nearest other-species breeds with ≥50 reports (2.8% death-coded here).

Warmblood - Dutch 2.7% · Horse Oldenburg 2.8% · Horse Birman (Sacred Birman) 3.1% · Cat Oriental 3.1% · Cat

Similar average weight

Nearest other-species breeds by reported average weight (7.1 kg here).

Nigerian Dwarf 7.5 kg · Goat Maine Coon 6.1 kg · Cat Norwegian Forest 5.8 kg · Cat Turkey (unknown) 5.7 kg · Turkey

What to do with this dog

A report does not prove a drug caused the reaction, and popular breeds simply generate more reports.

Frequently Asked Questions

How many FDA adverse event reports involve Terrier - Norfolk? ▼
There are 145 adverse event reports involving Terrier - Norfolk in the FDA database, of which 4 were death-coded (2.8% of those reports). That is a share of REPORTED events, not a mortality rate for the breed: adverse events reach the FDA when something goes wrong, so the denominator is reports, never the population of animals. According to the same FDA CVM extract, Terrier - Norfolk ranks #214 of 510 by report volume among all breeds PlainBreed indexes (#162 of 298 among dog breeds).
Where does Terrier - Norfolk sit among other breeds in PlainBreed's corpus? ▼
According to FDA CVM report volume, Terrier - Norfolk is #214 of 510 breeds indexed on PlainBreed (same ordering as the most-reported-breeds ranking). Inside Dog, it is #162 of 298. Among breeds with at least 50 reports, its death-coded share ranks #243 of 275 (same cohort as highest-death-rate). These are placement ranks in the reporting corpus, not clinical risk scores.
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 7.1 kg (15.7 lbs).

Compare a breed's report volume against how common the breed is before drawing conclusions. See our methodology for how the death-coded share and rankings are computed, or read breed-specific reporting patterns and FDA CVM reporting.

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

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Terrier - Norfolk (Dog), extract as of July 2026 extract. 145 reports · 4 death-coded (2.8% of reports, not a mortality rate) · #214 of 510 by volume.

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