Total Reports
5
Low report volume
Horse /
Breed profile · FDA CVM July 2026 extract
Hackney adverse-event record
Adverse-event filings for Hackney (Horse) in the FDA Center for Veterinary Medicine openFDA extract. Browse horse breeds, reactions, and outcomes below.
- #498 of 510
- by report volume (all breeds)
- 5
- FDA CVM reports on file
- 20.0%
- death-coded share of reports
- 2
- Injection site swelling - top reaction
How the 5 reports break down
By recorded gender -- every report on file for Hackney, no filtering.
Annual report volume
Data updated September 2026
The verdict
According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Hackney ranks #490 of 510 by total reports (5). Death-coded-share rank requires at least 50 reports. 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)
- #490
- This breed, reports of 510
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. Hackney has 5 reports now versus 5 in that prior snapshot: 0 the same number of (0.0%).
- Report change
- +0
- Death-coded reports
- +0
- 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 Hackney changesDeaths Reported
1
of 5 reports
Death-coded share of reports
20.0%
20.0% death-coded
Avg Age at Report
15.7 yr
271.1 kg avg weight
Death-Coded Outcome Share
Hackney death-coded reports 20.0%
Cross-breed median
20.0% of 5 hackney 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.
Average weight at time of report: 271.1 kg (597.8 lbs)
Top Reported Reactions
Injection site swelling 2
Injection site abscess 1
INEFFECTIVE, EUTHANASIA 1
INEFFECTIVE, DELAYED EFFECT 1
Application site swelling 1
Most Referenced Drugs
Ceftiofur 1
Ceftiofur Crystalline Free Acid 1
Pentobarbital Sodium + Phenytoin Sodium 1
Ivermectin + Praziquantel 1
Pergolide Mesylate 1
Outcome Breakdown
Ongoing
1 (25.0%)
Euthanized
1 (25.0%)
Recovered/Normal
1 (25.0%)
Outcome Unknown
1 (25.0%)
Gender Distribution
Female 2 (40.0%)
Male 2 (40.0%)
Mixed 1 (20.0%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2011 | 1 | |
| 2018 | 1 | |
| 2022 | 1 | |
| 2024 | 2 | |
Hackney: high death-coded share in the FDA CVM extract
Signature read: 5 reports place Hackney in the lower third of breed filing volume (#498 of 510). According to FDA CVM filings indexed on PlainBreed as of July 2026 extract, Hackney sits at #498 of 510 by report volume among all breeds and #53 of 55 among horse breeds, with 5 reports and 1 (20.0%) death-coded. Mean age at report: 15.7 years, average weight 271.1 kg (597.8 lbs).
Top reported signs: Injection site swelling (2), Injection site abscess (1), INEFFECTIVE, EUTHANASIA (1). Most-referenced drug: Ceftiofur (1 reports), followed by Ceftiofur Crystalline Free Acid (1) and Pentobarbital Sodium + Phenytoin Sodium (1).
Outcome coding on 4 status-recorded reports is dominated by Ongoing (25.0%). Annual submissions ranged 1-2,024 across 4 years on file.
Horse Breeds With a Similar Report Volume
Showing 6 of 54 horse breeds in our dataset, ranked by closest report volume.
Nationwide breeds with similar profiles
Sparse-volume peer sets for Hackney drawn from openFDA outside the Horse family so the neighborhoods are not species containment (the similar-volume list above stays within species).
Similar average weight
Nearest other-species breeds by reported average weight (271.1 kg here).
What to do with this horse
- Compare Hackney's report volume and death-coded share against similar-volume breeds nationwide. See similar breeds
- Read how death-coded share differs from a mortality rate before drawing conclusions. Breed-specific risks guide
- Browse every horse breed we track for comparison. All horse breeds
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 Hackney? ▼
There are 5 adverse event reports involving Hackney in the FDA database, of which 1 were death-coded (20.0% 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, Hackney ranks #498 of 510 by report volume among all breeds PlainBreed indexes (#53 of 55 among horse breeds).
Where does Hackney sit among other breeds in PlainBreed's corpus? ▼
According to FDA CVM report volume, Hackney is #498 of 510 breeds indexed on PlainBreed (same ordering as the most-reported-breeds ranking). Inside Horse, it is #53 of 55. It has fewer than 50 reports, so it is outside the death-rate ranking cohort (≥50 reports). These are placement ranks in the reporting corpus, not clinical risk scores.
What are the most common adverse reactions reported for Hackney? ▼
The most commonly reported adverse reactions for Hackney are Injection site swelling (2 reports), Injection site abscess (1 reports), INEFFECTIVE, EUTHANASIA (1 reports), INEFFECTIVE, DELAYED EFFECT (1 reports), Application site swelling (1 reports).
What drugs are most frequently associated with Hackney adverse events? ▼
The drugs most frequently referenced in Hackney adverse event reports are Ceftiofur (1 reports), Ceftiofur Crystalline Free Acid (1 reports), Pentobarbital Sodium + Phenytoin Sodium (1 reports), Ivermectin + Praziquantel (1 reports), Pergolide Mesylate (1 reports).
What is the average age of Hackney in adverse event reports? ▼
The average age of Hackney at the time of adverse event reports is 15.7 years, with an average weight of 271.1 kg (597.8 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 Hackney (Horse), extract as of July 2026 extract. 5 reports · 1 death-coded (20.0% of reports, not a mortality rate) · #498 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 →