Hello, wondering if anyone could advice me. we have a bunny, male, recently spayed, aprox 6 months old. he has had a recent obsession with trying to get behind the sofa, an area we dont want him as we cant see what he is up to. to stop him getting there we have shoved a pillow between the sofa and the wall, however every time he is let out of his cage he goes straight for the pillow and start biting, digging and trying to pull it out. currently im trying to stop him by doing this by spraying him with water when ever he does this. also keeping him distracted by playing with him, but as soon as i stop paying attention to him he goes straight over. is there anything else i can do to stop this behaviour?