How big is it? How old are they? The smaller the brooder, the more often you will need to tend to it. I like to give my chicks 1 s.f./bird for the first week or so, then, by the time they are 3 weeks old, I want them to have 2 s.f./chick. I do a deep litter management. As long as the litter is staying dry, I simply add more on top. by the time they move into the big girl's coop, their litter might be 6" deep.