I have an all rooster flock and a rooster with his hens flock. Normally they have an understanding that the rooster with the hens is the alpha and they fear him. He is also a mature rooster and they aren't even a year old. They usually get along and stay out of each other's way . They are free range by the way. Today my alpha rooster decided to go to a neighbors house and visit the hens there. He was gone all day but I could see him from my house. He just came home and got into a fight with my all rooster flock. Why is this? Was his absence a threat to the pecking order? Will this pass?