I have successfully trained my two Himalayan kittens (1 year old now) to use the toilet. I would recommend using a flip-up toddler seat (down for the cats, up for human use) as a permanent fixture on the toilet (buy the kind that attaches securely to the seat). My two cats felt substantially more secure and comfortable when I installed this, it gives them more room to balance and eliminated the problem of slipping and falling into the water. It made training faster and easier to progress through the steps.