Looks to me like a pit bull puppy, or pibble, as I call them. Too bad they fell from grace; they can be very sweet family dogs.

It's probably a Boston terrier (or Boston Bull, as they were known back then) or possibly a Pit Bull puppy. Pit Bulls were one of America's most popular breeds back in the first third of the 20th century. Both breeds had their ears routinely cropped, so that's why I am thinking a puppy.

Whatever the breed, the picture is a classic!

Anyone familiar with the breed of dog here? Just a mixed terrier breed of some sort? It almost looks a bit Frenchie to me.

Coats very similar to that are fashionable again now. I have a lovely red one myself. I don't think I'm nearly that adorable in mine though. At any rate, it's nice to see a non-hideous fashion come back in!

That is quite a mischevious smile on her face, I bet she got up to lots of shenanigans when her parents weren't looking.

@Tut I believe that is some sort of harness the dog is in and not a collar.

I'll bet it wouldn't take much for that pup to slip out of his collar.

Such a sweet little girl and her dog....I love this picture.. it is adorable!

Man, if this doesn't take the Shorpy Adorable Picture of the Week (Month ...Year ...[insert favorite time period]) prize, my Cute-O-Meter is seriously out of whack.