90% of dog owners suck. They let their dogs crap and run all over the place without any regard for anyone else. All the chickens I've ever run in my back yard have been killed by dogs. I don't bother trying to keep chickens anymore for that reason. I try to capture them. Eventually some make it to the compost heap. The others get taken to the dog pound... prolly where I ought to be working - minus their collars.