Olly is going through the terrible twos or something. If he's not chewing wires he's using anyone's legs as a climbing frame. My legs look like I've been dragged through a bed of nails. I've been clapping really loud (something my sister does with her cat) when he does something bad, but he doesn't react to it. He's not deaf because he jumps up every time the door goes. He just stands there looking at me clapping like I'm praising him before he goes back to chewing my wires. Do kittens have to be a little older to react to loud noises or do I just have a stubborn kitten?