I have two dogs here on the property, since losing the others in just the last several months. One is a 4 year old GSD who has been brought up with the chickens. He barely pays any attention to them while they are out, but will occasionally lay in the pasture while they are free ranging and just watch them or sleep. He couldn't really care less. The other dog, also has been raised with the birds. He is a beagle/chiuaha mix. Looks like a small white and tan beagle, just very small. He doesn't bother the birds either. Well, he didn't bother the birds until last Thursday afternoon! I saw him coming out of the coop, looking very strange. I went over to investigate and found five 3 month old BO pullets killed right in the coop. He had gone in and done his deed where I couldn't see him! The wife came home, just as I found the birds or there would have been another body to dispose of! He is confined to the dog pen, on death row. He has been charged, found guilty and sentenced to death if it happens again! He had never been any trouble with the birds until then. Morale???? Almost any dog can and will chase, and hurt the birds if given enough leeway! Keep them all in your sight or locked out of the path of the birds!