I woke up to all my chicks [except one week old chick who I found alive squished in a crevasse] dead in their outdoor elevated brooder a bin with it's lid tightly on which is solid plastic with 1/4" hardware cloth. Everything was in place and it doesn't look like anything was there or messed...
A few hours ago 10 mixed breed chicks were running around, eating, drinking, being cute, then, like chicks do, they all lay down to nap, we thought. A few hours later I thought they had bern asleep too long and on a hunch picked up one. She was dead. All but one of them were dead. Only one had...