The girls have just started spending days in their coop and our pooch is an Australian Shepherd/Husky Mix and is very interested in these birds. He watches them near the coop for awhile and then gets really excited and will POUNCE toward them. There's not really much I can do about it aside from keeping him in, but is it going to give these birds heart failure? They just seem to run to the other side. Is this just part of learning to coexist?