How long do you leave chicks with mother? I have a family of silkies in a tractor, 9 chicks with hen and roo.The chicks are feathering out and are about 4 weeks old. Two of the chicks are other breeds that the hen hatched with her own. The tractor is moved to fresh grass every other day and they have free choice feed. The run under the coop is 24 sq ft. I noticed the hen and rooster were occasionally pecking at odd chicks yesterday. Are they trying to cast them out of the family or is it time to take all of the chicks out of the tractor?