Total Reports
8
Low report volume
Sheep /
Breed profile · FDA CVM July 2026 extract
Katahdin adverse-event record
Adverse-event filings for Katahdin (Sheep) in the FDA Center for Veterinary Medicine openFDA extract. Browse sheep breeds, reactions, and outcomes below.
- #454 of 510
- by report volume (all breeds)
- 8
- FDA CVM reports on file
- 37.5%
- death-coded share of reports
- 3
- Lack of efficacy (endoparasite) - tapeworm - top reaction
How the 8 reports break down
By recorded gender -- every report on file for Katahdin, no filtering.
Annual report volume
Data updated September 2026
The verdict
According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Katahdin ranks #449 of 510 by total reports (8). 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)
- #449
- 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. Katahdin has 8 reports now versus 8 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 Katahdin changesDeaths Reported
3
of 8 reports
Death-coded share of reports
37.5%
37.5% death-coded
Avg Age at Report
0.8 yr
32.4 kg avg weight
Death-Coded Outcome Share
Katahdin death-coded reports 37.5%
Cross-breed median
37.5% of 8 katahdin 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: 32.4 kg (71.4 lbs)
Top Reported Reactions
Lack of efficacy (endoparasite) - tapeworm 3
INEFFECTIVE, STOMACH WORM NOS 2
Death 2
INEFFECTIVE, STRONGYLES 1
Lack of efficacy - NOS 1
Most Referenced Drugs
Albendazole 7
Ivermectin 2
Outcome Breakdown
Outcome Unknown
7 (70.0%)
Died
3 (30.0%)
Gender Distribution
Female 3 (37.5%)
Mixed 3 (37.5%)
Male 1 (12.5%)
Unknown 1 (12.5%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2011 | 1 | |
| 2013 | 3 | |
| 2014 | 1 | |
| 2015 | 2 | |
| 2023 | 1 | |
Katahdin: high death-coded share in the FDA CVM extract
Signature read: 8 reports place Katahdin in the lower third of breed filing volume (#454 of 510). According to FDA CVM filings indexed on PlainBreed as of July 2026 extract, Katahdin sits at #454 of 510 by report volume among all breeds and #6 of 9 among sheep breeds, with 8 reports and 3 (37.5%) death-coded. Mean age at report: 0.8 years, average weight 32.4 kg (71.4 lbs).
Top reported signs: Lack of efficacy (endoparasite) - tapeworm (3), INEFFECTIVE, STOMACH WORM NOS (2), Death (2). Most-referenced drug: Albendazole (7 reports), followed by Ivermectin (2).
Outcome coding on 10 status-recorded reports is dominated by Outcome Unknown (70.0%). Annual submissions ranged 1-2,023 across 5 years on file.
Sheep Breeds With a Similar Report Volume
Showing 6 of 8 sheep breeds in our dataset, ranked by closest report volume.
Nationwide breeds with similar profiles
Sparse-volume peer sets for Katahdin drawn from openFDA outside the Sheep 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 (32.4 kg here).
What to do with this sheep
- Compare Katahdin'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 sheep breed we track for comparison. All sheep 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 Katahdin? ▼
There are 8 adverse event reports involving Katahdin in the FDA database, of which 3 were death-coded (37.5% 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, Katahdin ranks #454 of 510 by report volume among all breeds PlainBreed indexes (#6 of 9 among sheep breeds).
Where does Katahdin sit among other breeds in PlainBreed's corpus? ▼
According to FDA CVM report volume, Katahdin is #454 of 510 breeds indexed on PlainBreed (same ordering as the most-reported-breeds ranking). Inside Sheep, it is #6 of 9. 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 Katahdin? ▼
The most commonly reported adverse reactions for Katahdin are Lack of efficacy (endoparasite) - tapeworm (3 reports), INEFFECTIVE, STOMACH WORM NOS (2 reports), Death (2 reports), INEFFECTIVE, STRONGYLES (1 reports), Lack of efficacy - NOS (1 reports).
What drugs are most frequently associated with Katahdin adverse events? ▼
The drugs most frequently referenced in Katahdin adverse event reports are Albendazole (7 reports), Ivermectin (2 reports).
What is the average age of Katahdin in adverse event reports? ▼
The average age of Katahdin at the time of adverse event reports is 0.8 years, with an average weight of 32.4 kg (71.4 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 Katahdin (Sheep), extract as of July 2026 extract. 8 reports · 3 death-coded (37.5% of reports, not a mortality rate) · #454 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 →