My Siberian Huskey is great with the girls. I think she's actually afraid of them. However, the German Shepherd gets loose every once in a while and killed half of my girls in one fell swoop. I think it has become his hobby. I think everyone is correct in that you would be better with a puppy so it can be raised with them. My dogs are 5 and 12 years old and city dogs. Never saw a chicken in their born days until last year. The Shepherd just hasn't adjusted to country life with all the chickens, sheep and horses. So, when he goes out to do his duty, I have to chain him up because he will chase anything that moves! When he is outside, he tries to catch the birds that are in the tree above him. We have a barn kitty that lived here when we moved in and the chickens chase her all over the place. She is scared to death of them. My Huskey is much, much more placid than the Shepherd. She doesn't have to be chained up and goes to the barn and lays near the girls and watches them but would never hurt them. I don't think size has much to do with it. It's the personality of the dog. I wouldn't want an ankle biter around my girls either. They would have little heart attacks, but do well with the Huskey.