Both of my cockerels have scabs on their combs. Is this from the little arguments they have over the ladies or do I need to be worried about parasites? I've never seen any parasites and the combs of the girls don't look this way. This is a pic of the BO cockerel I know the big one is a scratch, the ones I'm talking about are the tiny ones that are really hard to see in this pic. Sorry I don't have a better one. Thanks!