Hello, My chickens are still feather picking despite the beautiful spacious accommodations, etc. I have tried the pines peepers and they are able to get a claw underneath them and pull them off. Are there different sizes of peepers? If so how do I know which size to use. I have golden wyandotte and bard rocks. The bards are the ones who are more successful at pulling them off. Help. I am tired of seeing bald spots.