Hi! I am new to this chicken thing. We have 5 day old Black sex link hens. I have seen that they grow fast, but don't go out to the coop until fully feathered. So, where do I put them when they outgrow the tupperware bin I am using as the brooder but aren't old enough to move outside? We have a garage, but I don't know how to keep them safe in there if they need to be moved to a bigger space before they move to the coop.