Okay, so the answer for this, for me, is very clearly just no. If it's a dog, the dog runs around and rolls around in the grass, he's picking up sticks, mud, whatever, and he's bringing that back. You are not bathing him every night for him to be clean to get into your bed. And then on top of that, if it's just a back garden, even if you let him out, they will roll in the grass there where they usually piss and shit, right? The rain doesn't always wash that out, so he's tracking that back into the house. Meanwhile...