It may be a bit old and people dont do it anymore. But you shove the cats or dogs nose in the pile of shit then pick them up and take the dog out side and shove its nose in a pile of shit outside. Or in the case its a cat put the cat in the littler box and put its nose in the pile of shit. It may be crule but it still works, yyou do that a few times and the animal will learn.
