I recently took in some mixed bantam chicks. They are now 11 weeks old. They were sleeping on the floor huddled together. The others started to roost at a 18"AFF roost. The one silkie in the group desperately wants to be with the group but could not jump or fly to it. Very sad. We have been scooping her up and puting her on the roost. The question is this situation temporary? Will the bantam silkie eventually be able to reach it? And how high can they go?