Yes, she has a litter tray and doesn't go out much as we used to live in a flat so she's used to being indoors. Even if she goes out, she still comes in to use the litter tray! The result of feeding her wet food is that she wees and poos a great deal more than she used to, so I think she's having trouble getting used to it. She poos on the floor right next to the litter tray. Thanks for the other suggestions cat food wise. I'll give them a try.