Reaction profile

The FDA adverse-event record for loss of egg quantity

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

40 FDA reports name loss of egg quantity, a lower-volume reaction in the CVM extract (VeDDRA 745). Plate stamps and neighbourhood peers follow.

#1847 of 2,481
by report volume (all reactions): 40
reports citing this reaction: 22.5%
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 quantity has 40 reports now versus 40 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 quantity changes

FDA AER · VeDDRA plate

Code 745 VOL-TRACE

VOL-TRACE · DEATH-HOT · MID-PACK · PHOTO-FINISH · SPECIES-CHICKEN · DRUG-LEAD · DESK-NARROW · BOOK-FULL

VOL-TRACE 40 reports
DEATH-HOT 22.5%
MID-PACK #1847/2481
PHOTO-FINISH Acute (interstitial)…
SPECIES-CHICKEN Chicken · 38
DRUG-LEAD Narasin + Nicarba… · 14
DESK-NARROW 3 breeds
BOOK-FULL 8/8 fields

Nearest volume peer: Acute (interstitial) pneumonia/pleuropneumonia (±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 quantity

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

FDA AER report volume · neighbourhood around Loss of egg quantity

What the FDA AER plate says about Loss of egg quantity

Signature read: 40 reports place Loss of egg quantity in the lower third of FDA AER volume (#1847 of 2,481). Report volume is lower-third scale: 40 named reports in the openFDA extract. 9 of 40 reports were death-coded (22.5% of named reports, not a population mortality rate). Nearest volume peer: Acute (interstitial) pneumonia/pleuropneumonia (±0 reports). Lead species Chicken (38). Lead co-reported drug Narasin + Nicarbazin (14).

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 38

Turkey 2

Breeds Most Affected

Chicken (unknown) 32

Chicken (other) 6

Turkey (unknown) 2

Associated Drugs

Narasin + Nicarbazin 14

Narasin, Nicarbazin 8

Monensin Sodium 8

Narasin 4

Monensin 2

Hygromycin B 1

Nicarbazin 1

Lasalocid 1

Lasalocid Sodium 1

Deslorelin Acetate 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 quantity (#1847 of 2,481 by report volume); death-coded 22.5%. PlainBreed reaction plate · report volume stamp 40 · 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 →