At least that's what I get when I go to placenames.com and do an advanced search for "dog" in "type of place = populated places", USA only. (Today your dog, tomorrow the world.)
Places like Dogpatch, Alaska. Dog Town, California's Mono County. Dogway, Virginia. Ooh, don't you want to type in "ferret"? Or "tarantula"?
Unfortunately, the info goes not a heck of a lot further than that, so I cannot discover there how a town gets named in such a fashion. Anybody out there live in one of these?