My girlfriend is looking for a children’s picture book. She would have read it as a child, in the early 1990s, so if I had to guess, I’d target the publishing of the book in the 80s, but it could be anything pre-1995. She says it was about a young dog (she’s 99.9% sure it was a dog) being tucked in at night, and he asks his parents about where they live (she even thinks the title of the book may have been something like “Where do we live?”). His mom/dad told him about their street, then their city and planet. The artwork showed the other families in the book as anthropomorphic animals, and they all had unique houses (fish families had fish bowls, rabbit family had a hole in the ground, etc). The houses stood out to her, but may have only been artwork, may not have been noted specifically in the story. She believes the puppy may have been named Walter, or something similar. I know this isn’t a lot to go on!