This dog toy is the favorite of both Haole and Lila. They treat it very differently, though. Haole likes to carry it around gently in his mouth, place it somewhere, and lie nearby. Lila leaps around until she locates it, and then chews at it until it emits its very distinctive low-toned flatulent squeak, and then walks around delightedly, making strange noises. Haole looks uncomfortable and put out when she does this.
In any case, dogs seem to agree that the devil ball is lots of fun. I went to Neighbor and 517's house to water their plants and Lila wiggled from foot to foot until I let her in, and then she went romping around from room to room until she found the devil ball. I think she hid it somewhere.