This is one of the most unique places I've seen. This is literally, as the name implies, a bakery for dogs. They make fresh-baked biscuits, treats, and dog food. They also sell gift boxes, tins and accessories for dogs.
It's in Ladue which is a very nice area of St. Louis. The prices are a little high if you are comparing it to your regular Petsmart type treats, but just remember these are freshly baked items that probably taste a whole lot better to your dog.
Overall a great little store and a place you should definitely check out, if only on your dog's birthday!