My chicks are about 3-4 weeks old and I think they have outgrown their brooder. We have a finished coop, not the run. Temps are 90's day and 70's night. They haven't had any heat in the last week in the brooder, the garage was warm and I couldn't get the heat lamp far enough away from them with out them trying to get away from it. Will they be ok in the coop all night alone???