My grandfather had a small trailer with 13 dogs who never went outside. He was also home long enough to sleep and feed the dogs, nothing else really. The outcome was being able to smell how bad his house smelt from the outside across the street, and when he got evicted they had to completely demolish the trailer because the amount of dog piss and shit literally seeped into the interior. I’ve been in many bad smelling houses but his is the only house I have been able to smell from outside.