I think it would be hard to get an older dog especially with chickens around if you didn't know how they would do with them. HEChicken was lucky she could do a trial to see how the dog would do first & she lucked out. I'm sure other people haven't been so lucky that way. I know if my little Yorkie was allowed to be out there she definitely would not leave the chickens alone. Of course the chickens are bigger than her.