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You will never need to worry about your dog and the chickens... if - you teach the dog/puppy from the start that the chickens are not playthings. Our chickens free range during the day and walk all around the dog (golden retriever), they ignore her and she ignores them. The only problem is she does like to eat chicken poo if given the chance. It would not be a bad idea to get maybe three chicks after you get the puppie's basic training down, this way the chicks won't be all freaky when they are near the dog and she will learn that they are just another part of the family. Our chicks used to walk all over the dog when she was a pup. It falls into the same category as any kind of obedience training like no jumping, no tackling the kids, no eating off the table, etc.It is much easier to get a dog already having chickens than chickens already having a dog, see the following post.