I think it's just anyway it happens. I don't have any male silkie mixes but the 2 I have are female and one chick has a 5 toed foot and a 4 toe foot and the other chick has just 4 on both.Quick question - how many toes do your Silkie cross chicks have generally? Just checked my three chicks and the (girl) has 5 and the boys 4. Is there a sex difference perhaps? xx