We bought 12 chicks on April 1st and 6 of them ended up being roosters. I would like to keep one of them for our flock of 6 Red stars, 3 Plymouth Rocks and 2 White Chanticleers. They seem to be ganging up on the chickens and almost as a pack. Is it too early to cull them, or should I wait until they are a little older? Thanks!