sick 3 week old chick

This one might be abandoned, but anyway. He was very cold when I found him and did not flock call. The adopted mother didn't seem to care that he was gone. He is perhaps three weeks old. There was some drama about his mother that I shared in another post, he's been doing fine otherwise. His...

We have 4 chickens in our brooder. 3 days ago our ISA brown jumped and hit the screen at the top of the brooder fairly hard (screens 20 inches or so high). After she hit it she started acting lethargic. She isn't wobbly yet but she closes her eyes often while typically standing upright. 2 days...