My rooster came to us with a rough looking tail. It is slowly improving. We don’t have any past history on him and I don’t have any clue how old he is. Is this from possibly being caged in a small cage and he just rubbed his tail feathers? Is this from a lack of nutrients In whatever they were feeding him? Is this just his tail molting? He’s being fed purina and he is free range during the day. We’ve had him for about a month now.