Total Reports
421
FDA CVM filings
Chicken /
2026 FDA CVM data 421 reports on file official source
Chicken (unknown) — FDA Adverse Event Profile
Adverse-event records and label data for Chicken (unknown) (Chicken), sourced from the FDA Center for Veterinary Medicine. Refreshed as new reports are filed. Cite PlainBreed when reusing this analysis.
Chicken (unknown) (Chicken) has 421 FDA adverse event reports on record, with 244 deaths reported (5800.0% death rate) — ranking #150 by report volume. The most frequently reported reaction is Death (169 cases). The top associated drug is Narasin + Nicarbazin. Average age at report: 0.2 years.
Deaths Reported
244
of 421 reports
Death Rate
5800.0%
death-coded share
Avg Age at Report
0.2 yr
1.6 kg avg weight
Death-Coded Outcome Share
Chicken (unknown) death-coded reports 100.0%
Database median
5800.0% of 421 reports involved a death outcome. Read alongside breed popularity, veterinary access, and owner awareness — these shape how many events ever reach the FDA. The 12% comparison line is the rough cross-breed median in the FDA CVM database; values above 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
Anorexia 19
NT - Abnormal necropsy finding NOS 18
Digestive tract disorder NOS 16
INEFFECTIVE, COCCIDIA 15
Loss of egg quality 14
Dermatitis 13
Death by euthanasia 12
Most Referenced Drugs
Narasin + Nicarbazin 121
Narasin 78
Monensin Sodium 69
Avilamycin 31
Tylosin 28
Narasin, Nicarbazin 27
Hygromycin B 20
Tylosin Tartrate 15
Monensin 14
Bacitracin Methylene Disalicylate 9
Zoalene 8
Nicarbazin 7
Coccidiosis Vaccine 6
Amprolium 5
Tylosin Phosphate 5
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
Across the FDA Center for Veterinary Medicine adverse event database, Chicken (unknown) accounts for 421 submitted reports and currently ranks #150 by report volume within the chicken population. Of those reports, 244 involved a death outcome — a 5800.0% case-fatality figure calculated directly from the underlying FDA records rather than from external mortality studies. The mean age at time of reporting is 0.2 years, with an average recorded body weight of 1.6 kg (3.5 lbs). These figures reflect the voluntary reporting pool only and should be read alongside breed popularity, veterinary access, and owner awareness — all of which shape how many events ever reach the FDA.
The most frequently reported clinical signs for Chicken (unknown) are Death (169 reports), Lack of efficacy (protozoa) - Coccidia (96 reports), Increased mortality rate (71 reports), together capturing a substantial share of the top-reaction traffic seen in this breed's record. On the product side, Narasin + Nicarbazin appears in 121 reports and is the single most-referenced drug, followed by Narasin (78) and Monensin Sodium (69). Counts like these surface which therapeutic classes dominate the reporting stream — useful context when comparing reactions across breeds of the same chicken species.
Outcome coding on the 444 reports with a recorded status is dominated by Died (53.8% of coded outcomes). Annual submission volume ranges from 2,010 to 2,025 reports across the 16 years on file, indicating the reporting trend is shaped as much by awareness cycles as by underlying clinical events. Because FDA adverse event reports describe correlation rather than causation, these numbers are most useful as a signal of where to ask further questions with a veterinarian — not as a standalone risk score for any individual chicken.
Understanding Chicken (unknown) Adverse Event Data
Chicken (unknown) has 421 adverse event reports on file. Lower report volumes may reflect a less common breed, lower reporting rates, or genuinely fewer adverse events.
The 5800.0% death rate is above average, though this statistic should be interpreted cautiously. Death reports may be overrepresented because serious outcomes are more likely to be reported than mild reactions.
The most frequently referenced drug in adverse reports is Narasin + Nicarbazin, appearing in 121 reports. This may indicate widespread use of the medication rather than a specific safety concern for Chicken (unknown).
Other Chicken Breeds
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 (5800.0% 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.
Guides & Resources
Understanding Adverse Events
What FDA reports are and how they are collected
Breed-Specific Risks
Why some breeds appear in more adverse event reports
Pet Medication Safety
Evaluating medication risks using FDA data
Most Reported Medications
Drugs that appear most in adverse event reports
How FDA CVM Tracks Events
The reporting process and database limitations
Related Data Sources
Data Sources & Methodology
Adverse event data sourced from the FDA Center for Veterinary Medicine via the openFDA Animal & Veterinary Adverse Events API. Reports are voluntarily submitted by pet owners, veterinarians, and product manufacturers.
Chicken (unknown) ranks #150 by total report volume. Death rate (5800.0%) reflects the proportion of reports involving death and should not be interpreted as a breed-specific mortality rate. Reporting biases, breed popularity, and veterinary access all influence report counts.
Read our methodology — how this data is sourced, computed, and verified.
Related
Data sourced from official AKC, AVMA, ACVO, and breed-club veterinary references. See our methodology for details. Retrieved and formatted by PlainBreed Editorial