Have one old boy, who is now 13. Rescued a kitten 18 months ago. There has been no love but they will sit together quite amicably. In the past few weeks the kitten has been attacking the old boy when he uses his box. So he has been quite stressed and has been peeing and pooping on our bed or the sofa. I don’t know why she has started to do this. They have three boxes between them. I am just so sorry for him. I think the only way we are going to get round this is to rehome the kitten. We have Feliway wafting around the house, I spray her with water if it looks like she is going to attack him, and hold her, if I am around, when I hear him using his box. Any ideas?