Good morning! I just recently rescued a 10-month-old male GSD who was dumped by his previous owners. He's an amazing dog so far! However, he has an affinity for paper and cardboard. He will destroy any of this material that he can get his mouth on. He's well supplied with antlers and nylabone, and while he enjoys these, he definitely prefers paper. He doesn't eat it; he just likes to shred. For reference, he is getting daily walks, but not any strenuous exercise at the moment as he is healing from a chryptorchidism neuter. Does anyone have suggestions for durable and safe toys that dogs with a paper/cardboard shredding penchant would enjoy? This is my first shepherd but I've raised pits, rottweilers, and huskies in the past and have never had a dog so keen on paper, so I don't know what to give him. Thanks in advance.