We adopted our boy just over a year ago from a rescue. He’s been happy and settled but I’m getting a bit worried about his behaviour over the last few days. He’s seemed a bit jumpy and yesterday he came running in , rushed around the house crashing into a door bumping his head. He then bit and ripped up his cardboard scratch mat and went to hide under a bed. He’s been wanting to bite and rip cardboard a lot lately and that’s a new behaviour. I’m wondering if there’s something outside that’s scared him? A new cat maybe? I’m not sure what to do, if anything ?