Karlin said:...Actually my house is small and the litter box is in the bathroom and I could hear her banging around in there. It is very hard to prevent her going in -- because Quincy, one of my cats, has only three legs and the missing leg is a front leg (harder for them to balance than losing a back leg) my options are limited with the litter box -- I can't just put it up higher.
Also you can buy cat litter boxes that have top entries and are built into a kind of dog proof box. If Lily stays here I may have to consider something of that sort.
She gets spayed on Wednesday BTW.