I recently got a silkie rooster to breed with my 2 frizzle bantams. He has fathered 2 chicks already from the previous owner and is not yet 12 months old. My girls are 3 years old and I introduced him to their Avery yesterday. I have seen one of my girls picking on him a bit but otherwise they ignore him. Are my girls too old to have chicks as they are 3 years old already and when will he show signs of mating?