Happened to me. Bought 6 chicks (pullets) at Rural King, one ended up a roo. Even though I loved the crowing, as did all my neighbors, I had to rehome him. Can't have roosters where I live and I refuse to be the rule breaker that messes up the ability to have chickens. It's not fair when you follow the rules so you can have something, but someone else doesn't want to follow those same rules, then ends up messing it up for everyone.