Hi. Quick question. Islacat keeps flicking over the sides of her tray liner. Are there any liners that just lay flat in the bottom of the tray? She is being left quite a lot at the moment as DP is in a hospice and his neighbour and I take it in turns to feed and clean her tray. She only has one front paw and still manages to cause chaos. I'm worried if she flicks the sides over she will poo on the floor instead. I don't like the ammonia smell in the litter which is why I started using the liners!!