I just bought a pair of black cochins and a blue cochin cockerel, stupidly, without seeing them first. They are about 10-15 weeks old but all of them have a couple of white feathers in their wings and the black one have white feathers around their combs. Does this mean they are not pure bred or just don't have very good gentics? And what will the chicks be like, better or worse standard than the parents, any ideas ?