Just want to make sure they are okay

[Chickenrainbow]

Hello, I am new to this website and to raising chickens. One of mine has already fies since she had an internal infection before we got her. It was hard but I hope she was comfortable before she passed. Anyway I now have 4 chickens all different types, and my smallest is concerning me. She sleep a LOT during the day when the others are far more active and bigger. I've gotten her to drink water on her own and eat some. I use electrolytes in the water and change it out every 2 days. In between I dump and clean when they kick dust in it. I clean their coopish thing every week since it is fairly big but wonder if I should do it more often. Pls someone help me make sense of this.

 

[rosemarythyme]

How old are they? How long have you had them? What are they eating?

If one is noticeably smaller, she could be a runt, or it could be failure to thrive, which is just a generic term to say there's something wrong internally. Can't do much about it if that's the case.