I have one Rhode Island Red rooster and one hen that are sick. They have foaming liquid coming out of their beak and it is all over their beak. They just sit around with their beaks open a little and make raspy noises. The roosters comb is turning a dark color. The hen started acting funny first making gasping noises and then the next day both the rooster and hen were really sick. Does anyone know what they have and how to help them and should I isolate them from the other chickens so they don't get it. We had been letting our chickens free range but we had some problems with a new dog so we looked them up. They have a good sized coop with an outside run that is about 10' by about 30'. The Rhode Island Red chickens had been flying over the gate and free ranging all day because the dog was really only going after the ducks that we have.