The bulb might have been a coated bulb that give off toxic fumes. The other time it was used there may have been better ventilation or something caused the bulb to off gas moreOne of my Michigan thread friends had 30 chicks and turkey poults die on him about a week ago - they were in a brooder, in a new coop, previously used light bulb, no mess or appearance of a struggle, no wounds, and he had seen them 30 minutes before looking perfectly normal. Still trying to figure that one out![]()