Wow - what an awful day! I'm so sorry this happened - and with 3-week-olds...? It's really baffling and just doesn't make any sense at all. I think I have the same sized dog crate that you have and just raised 13 chicks in it, no problems, and they got pretty crowded there towards the end. What breed were your chicks?
I'm really stunned and so sorry - what a nightmare!
I'm really stunned and so sorry - what a nightmare!