I have 25 1 week old baby chicks (more work then I ever imagined, but I LOVE them!). Anyway, I started them out in a large dog kennel in the house for the first few days as we had a cold snap. This weekend I moved them to two bathtub brooders in the coop. I have 12 in one, and 13 in the other. I think they've outgrown their space, as their brooders are getting really dirty, really fast, and instead of cleaning them once a day, I've had to clean them twice a day, and they seem to get dirty immediately. I'm going to move the dog kennel out to the coop and put some of the chicks in there. I have a feeling this won't be much help for very long. My question is, how soon can I move them to the coop floor, (it's dirt), and get them out of the brooder? I have 6 older chicks (10 wks old) who are separated from the new ones by a wire wall that runs down the center of the coop, so the chicks would be safe. It's getting down to the high 40's, low 50's at night, and of course I'd provide a heat lamp(s) for them still. My concern is coccidia my older chicks were hopping out of their brooder at about 3 weeks, and I just let them run in the coop with access to the brooder and heat lamp at night until they started roosting, but the new ones are still way too small for that I think. My older chicks didn't have any issues with illness. What does everyone recommend I do? I have plenty of room in the coop, but I'm afraid I'm going to run out of brooder space really quick.