Hi there, I have some 6 week old chicks going in the coop tonight and I was debating also putting in the 2 and 1/2 week old chicks with them tonight. There is 6, 6 week olds and 4 2 and a half week olds. The only problem in the temperature is going down to just above forty tonight. But it will be above fifty for the rest of the summer. Would it be okay to put them all in tonight? I'd rather not separate them. thanks!