I'm currently having an issue with aggressive guineas attacking my cornish x roosters. The guineas are a few weeks older than the chickens, but everyone was raised in the same brooder, lives in the same house and ranges on the same property. Just recently the guineas have begun to target the corn x boys and will chase them until they are exhausted. The poor guys will usually just bury their heads under a wing or in the wood pile if they make it that far and take the beating. It started as a once in a while thing but very quickly became a full time job for the guineas - chase one down, peck it until they get bored, go chase another one down. Its terrible to watch or listen to and gets all the other chickens very upset too. I've actually considered slaughtering the roos ahead of schedule to put an end to it but I'm afraid they would just target the next chicken down the line.
Any ideas what's going on or how I might alter the behavior? I have a very happy little flock and am developing some pretty deep resentment for the guineas.