Total Reports
421
FDA CVM filings
Chicken /
FDA CVM · 2025 release 421 reports on file
Chicken (unknown) - FDA Adverse Event Profile
Adverse-event records for Chicken (unknown) (Chicken) from the FDA Center for Veterinary Medicine.
Data updated June 2026
The record at a glance
Chicken (unknown)'s FDA record: #150 most-reported chicken breed, 421 total reports, 58.0% death-coded (244 reports).
- #150
- most-reported chicken breed
- 58.0%
- death-coded report share
- 169
- Death - top reaction
- 0.2 yr
- average age at report
Higher volume usually means a more popular breed, not a riskier one, compare against how common the breed is.
Deaths Reported
244
of 421 reports
Death Rate
58.0%
death-coded share
Avg Age at Report
0.2 yr
1.6 kg avg weight
Death-Coded Outcome Share
Chicken (unknown) death-coded reports 58.0%
Cross-breed median
58.0% of 421 chicken (unknown) 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: 1.6 kg (3.5 lbs)
Top Reported Reactions
Death 169
Lack of efficacy (protozoa) - Coccidia 96
Increased mortality rate 71
Lack of efficacy - NOS 66
Loss of egg quantity 32
Accidental exposure 23
Enteritis 20
Lack of efficacy (bacteria) - NOS 20
Most Referenced Drugs
Narasin + Nicarbazin 121
Narasin 78
Monensin Sodium 69
Avilamycin 31
Tylosin 28
Narasin, Nicarbazin 27
Hygromycin B 20
Tylosin Tartrate 15
Outcome Breakdown
Died
239 (53.8%)
Outcome Unknown
154 (34.7%)
Recovered/Normal
25 (5.6%)
Euthanized
11 (2.5%)
Ongoing
8 (1.8%)
Recovered with Sequela
7 (1.6%)
Gender Distribution
Unknown 161 (38.2%)
Mixed 145 (34.4%)
Female 86 (20.4%)
Male 29 (6.9%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2010 | 42 | |
| 2011 | 47 | |
| 2012 | 40 | |
| 2013 | 42 | |
| 2014 | 31 | |
| 2015 | 37 | |
| 2016 | 44 | |
| 2017 | 29 | |
| 2018 | 27 | |
| 2019 | 14 | |
| 2020 | 8 | |
| 2021 | 11 | |
| 2022 | 22 | |
| 2023 | 9 | |
| 2024 | 16 | |
| 2025 | 2 | |
Chicken (unknown) Pet Health Insights
Chicken (unknown) accounts for 421 FDA adverse event reports, ranking #150 by volume among chicken breeds, with 244 reports (58.0%) coded as a death outcome. Mean age at report: 0.2 years, average weight 1.6 kg (3.5 lbs).
Top reported signs: Death (169), Lack of efficacy (protozoa) - Coccidia (96), Increased mortality rate (71). Most-referenced drug: Narasin + Nicarbazin (121 reports), followed by Narasin (78) and Monensin Sodium (69).
Outcome coding on 444 status-recorded reports is dominated by Died (53.8%). Annual submissions ranged 2,010-2,025 across 16 years on file.
Chicken Breeds With a Similar Report Volume
Frequently Asked Questions
How many FDA adverse event reports involve Chicken (unknown)? ▼
There are 421 adverse event reports involving Chicken (unknown) in the FDA database, with 244 reports involving death (58.0% death rate). Chicken (unknown) ranks #150 by report volume.
What are the most common adverse reactions reported for Chicken (unknown)? ▼
The most commonly reported adverse reactions for Chicken (unknown) are Death (169 reports), Lack of efficacy (protozoa) - Coccidia (96 reports), Increased mortality rate (71 reports), Lack of efficacy - NOS (66 reports), Loss of egg quantity (32 reports).
What drugs are most frequently associated with Chicken (unknown) adverse events? ▼
The drugs most frequently referenced in Chicken (unknown) adverse event reports are Narasin + Nicarbazin (121 reports), Narasin (78 reports), Monensin Sodium (69 reports), Avilamycin (31 reports), Tylosin (28 reports).
What is the average age of Chicken (unknown) in adverse event reports? ▼
The average age of Chicken (unknown) at the time of adverse event reports is 0.2 years, with an average weight of 1.6 kg (3.5 lbs).
Does a high number of adverse event reports mean Chicken (unknown) 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 Chicken (unknown) 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.