We tried it with Loki and he wasn't having any of it. He was terrified of the toilet and would hold it for as long as possible until a human happened to need to use the toilet and then would dash in and do his business. Because he already had kidney problems, I didn't want him trying to "hold it" all the time.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry