Then why get a dog if you keep it outside? Why not a cat or a statue?
Cats are different animals and all those I know who have them (incl. my house) has cat flaps for them to do as they please.
Are you also implying that a statue is equivalent to a dog kept outside? Care to elaborate?
Keeping one outside doesn't mean you don't get to feed, play with them, take them for walks, cuddle them and do anything else you usually do with a dog.