my sweet little girl darcy, a 1.5 year old mini bernedoodle, has easily destroyed every single toy i've ever given her, each in about 20 minutes, no matter how "tough" they're supposed to be. i bought her a tizzi because i saw it on sale at a local pet store. the tag said "guaranteed durable" or something to that effect, to which i laughed "ha, we'll see." turns out, i was wrong, which made me very happy. she has chewed it every single day for months now, and aside from a few little dents, it is still intact, which is a miracle - and she LOVES it, it's definitely her favorite toy. just bought her a hurley for xmas because of the awesome performance of the tizzi. thanks west paw!