I am quite new to the world of raising chickens. I have 5 chickens which I am told are Plymouth rocks. One of the chickens is much larger than the rest, has yellow legs (but no spurs) longer tail feathers and has a longer neck. It is about 5 months old and this morning started to crow. I am not allowed to keep a rooster where I live, but do not want to get rid of a hen needlessly.