I don't think there are many "bullie tested" toy makers! It's a joke when most say "tough" tested or "chew proof" I read that and . Durabones(by nylabone) are the ones that last the longest here. I had a toy box full of talking stuffies, as my Malanois never chewed them. One by one, the bullies mutilated them and now no more stuffies. Even the no stuffing kind dies in a tug of war!