You can teach them to shit in certain areas it just part of there nature to go any where so it would be hard to change them

also we are all considering diffent types of animals (most probably from previous experinces) like the perfect cat or perfect dog when each individual dog or cat are unique in the own aspect...
i
Like I could think of when I was small this cat always shitted on me when ever I picked it up
or now we have this cat that sticks to himself and does his own thing they are both totally differnt but the same species so it really is too hard to compare