My favourite cockerel has a tiny underbite. It doesn’t seem to bother him. I can only keep one of my cockerels, and am planning to use him for breeding. I don’t know whether to cull him and keep one of the others, or if it’s “safe” to keep him. Is it likely that my future chicks get an underbite too if I keep him? Is it purely aesthetical, or could it be a sign of a more serious condition?