BREAST BLISTERS ON POULTRY – Small and backyard poultry

A breast blister is an enlarged, discolored area on the breast or keel bone often seen in heavy chickens and turkeys. The incidence can be aggravated by wet litter conditions.

Photograph showing turkeys with and without breast blisters — Turkeys with (right) and without (left) breast blisters. Source: John Anderson, The Ohio State University