I had to get my 19 year old girl and enclosed litter tray with cat flat as she is just so messy and stinky and spreads litter liberally all over the house, kicks it all out.
She hates it, she will go in but miaows loudly at the indignity and the whole thing rocks from side to side while she is in there, I don't know what the hell she is doing.
Then she comes out and miaows angrily at me and stalks off to sleep in the cupboard - her favourite place.
Got a special mat to to reduce the cat litter trail. So far so good but she hates that as well - looks like she's walking on lava!!