Most puppies will tear through collapsable crates. Most puppies are destruction machines. Its up to us to teach him the rules of politeness and proper behavior. Don't rely on simply tossing your puppy outside because he's destructive. (you toss him outside because he's destructive indoors then you are surprised he turns around and shreds a plastic pads?) Sorry if I sound sarcastic, but do you know how many people I talk to on a daily basis who ask for advice then turn around and ignore it because they aren't prepared to actually follow through? They want an answer but don't want to take the time and energy to make the solution work. I just got the feeling from you that you wanted an answer to shredding pads but don't want to do more work than dealing with the potty pad issue.... but the potty pad is a symptom of the whole puppy.