Each group of guineas is a bit different. I can't say what would change anything except that in doing some research with other guinea owners, it seems that if you have a larger flock of guineas so that they form their own society, completely apart from the chickens, they may do better. I had four guineas and ten chickens at the time and they roosted in the same coop. I did separate out my guineas during the worst of the attacks, for two full weeks they were cooped up. The moment I let them out, they were at it again.