EDIT: 2023-01: Experiment an overall failure despite initial partial success. One cat did accept the change and used the seat even once it was on the toilet. The second cat unfortunately wanted nothing to do with the seat and started going to the bathroom on the floor. I tried to keep up with it, but despite my best efforts the bathroom quickly became a biohazard area. I had hoped the first cat would be a good example for the second butt instead it worked in reverse. Once second cat went on the ground the first cat decided that must be ok too and I’d often come home from work to a disgusting mess. I had to call the whole thing off. I think training a cat to use the toilet would work great if you started with kittens and they didn’t know any different, but older cats can be very stubborn.