Reaction profile

The FDA adverse-event record for loss of egg quality

Name: Loss of egg quality - FDA Animal Adverse Reaction
Creator: PlainBreed
License: https://open.fda.gov/license/

17 FDA reports name loss of egg quality, a lower-volume reaction in the CVM extract (VeDDRA 744). Plate stamps and neighbourhood peers follow.

#2243 of 2,481
by report volume (all reactions): 17
reports citing this reaction: 5.9%
death-coded share: Chicken
most-affected species

Compiled by PlainBreed

Verify with FDA CVM →

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. Loss of egg quality has 17 reports now versus 17 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 Loss of egg quality changes

FDA AER · VeDDRA plate

Code 744 VOL-TRACE

VOL-TRACE · DEATH-PAR · BOTTOM-DECILE · PHOTO-FINISH · SPECIES-CHICKEN · DRUG-LEAD · DESK-NARROW · BOOK-FULL

VOL-TRACE 17 reports
DEATH-PAR 5.9%
BOTTOM-DECILE #2243/2481
PHOTO-FINISH Anoestrus
SPECIES-CHICKEN Chicken · 17
DRUG-LEAD Narasin + Nicarba… · 11
DESK-NARROW 3 breeds
BOOK-FULL 8/8 fields

Nearest volume peer: Anoestrus (±0 reports)

Instrument codes from this reaction’s FDA CVM adverse-event extract: volume band, death-coded share, corpus rank, photo-finish peer, lead species, lead drug, breed desk, and book completeness. Not a clinical diagnosis.

Lower-volume neighbourhood around Loss of egg quality

Lower-third volume poles plus nearest peers, not a full reaction corpus board reprint.

FDA AER report volume · neighbourhood around Loss of egg quality

Loss of egg quality: low death-coded share in the FDA AER plate

Signature read: 17 reports place Loss of egg quality in the lower third of FDA AER volume (#2243 of 2,481). Report volume is lower-third scale: 17 named reports in the openFDA extract. Death-coded share is lower-third: 1 of 17 reports (5.9% of named reports). Nearest volume peer: Anoestrus (±0 reports). Lead species Chicken (17). Lead co-reported drug Narasin + Nicarbazin (11).

Read these counts as reporting volume, not risk: per our methodology, Lead co-reported drug Narasin + Nicarbazin appears in filings alongside this reaction; that is association, not causation. Browse the full reactions index or the about page for how PlainBreed frames FDA CVM extracts.

Species Most Affected

Chicken 17

Breeds Most Affected

Chicken (unknown) 14

Chicken (other) 2

Dutch Bantams 1

Associated Drugs

Narasin + Nicarbazin 11

Monensin Sodium 3

Narasin 1

Carprofen 1

Wet-Milled Fenbendaz Oral Susp 1

What to do with this reaction

Read how death-coded share differs from a mortality rate before drawing conclusions. Understanding adverse events
Browse the full reaction directory to compare report counts across reaction types. All reactions

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

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

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Loss of egg quality (#2243 of 2,481 by report volume); death-coded 5.9%. PlainBreed reaction plate · report volume stamp 17 · vintage 2025.

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