If you are going to live with birds you have to get used to having things pooped on, I use sheets too to protect the back of the couch and chair where they like to sit on when I am with them but with leather you would have to also be concerned with puncture holes. The way I see it their poop is not like cat or dog poop which is much larger and stinks, at least bird poop is much smaller and has hardly any odor, it doesn't bother me as it probably doesn't most of us bird people, we take the bad along with the good and the good far outweighs the bad, just my opinion.