My great big 10 week old RIR chicks have been staying in a 100 gallon stock tank with a daytime stay in a wire run 4 x 12 out in the sunshine. And finally yesterday we finished the converted 12 x 12 horse stall. They seem to be happy but have just ignored the roost we made for them. It is a slanted ladder type. Do they have to learn to roost and will begin that after they get used to their new house?