I have 8 young Polish pullets & cockerels that I'm raising to show & sell at our county fair in a few months. They're kept in a roomy pen and shouldn't have any complaints. But they are pecking the feathers off the heads of a select few. I really don't want to keep each in a separate pen, is there anything I can put on their heads to discourage the plucking? Someone told me that she used diaper rash cream, has anyone else tried something like this?