Thanks for responding. There is nothing in there to conceal them. It is like the thing finds a way in, tries to eat the chick, can't and leaves. Ugh. I actually brought them back into the garage until we can figure out what to do.
We have lost 2 eight week old chicks. We are guessing snakes but not sure because we just find the chick dead with slimy stuff from their head to the upper chest. Is this a snake who has tried to eat the chicks and they are too big to swallow?
Their grow out house is 2 feet off the ground...