PetSafe's Busy Buddy Nobbly Nubbly treat-holding toy became one of our reviewer's dog's new favorite; he loved it right from the start, gnawing on it for the entire evening. The refillable toy holds rawhide rings (they come with the toy and are also sold separately) on both ends. Our tester gave it to her dog anytime he seemed restless, and it was perfect at keeping him entertained. He loved both the peanut butter and sweet potato rawhide flavors. For added flavor enhancement, the toy's center grooves can be filled with smearable treats, such as cheese or peanut butter. The Nobbly Nubbly comes in four sizes to keep practically any size dog entertained and busy for a long time.