I have 5 three month old pullets. When can I put them in with the big girls? They need to get out of their side of the coop as soon as possible. The roof is leaking. The have already be mingling together, since the big girls like to be escape artists and get into the little girl's side of the coop. The little girls are the same size as the silkie mix bantam hen and the frizzle bantam rooster I have in with the big girls.