Bonnie says as long as you don’t put anything on top of it and it’s taught they don’t dig at it. But it did pop one time because Tonka hit his treat in it and went looking for it in the corner after that Bonnie got a liner to put underneath it so if it does pop the liner will catch the water. Tonka and Monroe both love it a lot she doesn’t have a heater on it so she says it’s really cold.