Used this for crate games to help with teaching my dog to crate and working with him while I was at home and under constant supervision. While licking the food off the groov he was also grazing it with his teeth and biting the frozen pumpkin mixture off the groov. As soon as I realized he was trying to bite the mix off of it, I took it off the crate. It was too late, he had nawed at the end of it. Having it less than a few hours and it was ruined. For a product that is meant for crate training, one would think it would have been made out of studier material, especially for the price. Incredibly disappointed and wish I had not invested in this product. Will not buy again.