yeah, my border collie seems to "builds up" boredom, if he gets too much of it, like more than 1 or 2 or maybe 3 days tops, he might have to kill a toy.....doesnt' happen often, but, when it does, it means he is or was upset. and sometimes he is upset cuz he was built up some boredom. Most breeds tolerate boredom better than many border colllies can take it. Many BCs just don't seem to handle boredom as well as some other breeds can. For a day or so, sure, but not a few boring days in a row........*my* border collie can't take that...goes nutty. This is one reason some ppl say one has to research the breed they are interested in taking home, to know, what are common behaviors of the breed. I'm just so glad my dog only rips up HIS STUFF if he gets bored...whew. of course, there are certainly individuals within a breed, no group of dogs of a breed are all just alike, nope. Dogs are unique individuals. and maybe some ppl have dogs who would still rip up a toy, even if the dog DID have a good run outdoors, several play sessions, a few long walks, some tricks training sessions, etc, maybe their dog would STILL rip a toy even on a busy, tiring day like THAT(?).....but mine wouldn't tear up a toy on a day like THAT.