I successfully got 2 middle aged cats to do this. They have both since passed and I have two new cats. I haven't bothered to train them, but I think it's because my wife cleans their box and I haven't thought about it.
The first two cats did this almost effortlessly. They didn't give us any trouble because we changed steps slowly.
The first two cats did this almost effortlessly. They didn't give us any trouble because we changed steps slowly.