Instruct: Classify a review into positive or negative sentiment.
Query: Good idea, but not very robust

My 7 month old dog plays with the neighbor's 75 lb Malmute / wolf puppy and somehow they managed to chew this collar off! This didn't happen with my dog's previous collar, which was a cheap 1 inch collar purchased at Ross's dress for less. It's a good design idea, really helps to control your pet with gentle guiding when a leash isn't handy.