That is not true of all dog owners homes. I’ve been in homes whereas there are no pets and their houses have stunk. Some people leave dirty dishes in their sink with stuck on food for days, or they don’t take the kitchen or bathroom trash out which can also stink, especially if there are dirty diapers in them or women’s personal hygiene products. So, don’t say that all dog owner’s homes smell so bad when it’s only the one’s that YOU have entered that have smelled bad.