The Dog Breed Set is a DLC pack for Fable III available for free from Xbox LIVE Marketplace. It adds three new breeds for your dog that can be changed by interacting with the dog basket in the Sanctuary. The three breeds are the Poodle, the Alsatian, and the Doberman. The Poodle has two variations, pink and white.
A free version of this DLC pack, which will allow players to see other people's new dog breeds, but will not allow them to change their own, can be downloaded with the Fable III Free Yule Hat DLC item. They will still be able to change their own dogs in the future by purchasing the Fable III Dog Breed Set at a later date.