Instruct: Classify the given Amazon review as either positive or negative.
Query: Ends of jack can be damaged by aggressive chewer

My 35 lb. springer spaniel mix is a brutally aggressive chewer. She quickly tore very small pieces off the ends of the jack legs. But the damaged area only extends one half inch or so from the tips of the jack's legs. Neither of my dogs seems particularly interested in the toy, but they will occasionally chew on it if I involve the toy in a game.