I have a couple of canvas dog bags from the Laurel Burch line. These are more pop-art design, than realistic looking. She does dozens and dozens of different bags, jewelry, accessories, etc. The website that carries a huge selection of her line is www.colorfulcritters.com. There are canvas, tapestry and leather selections of cats, dogs, horses, and a smaller selection of other critters and all in various colors. If you like something a little different, you might like some of these.
Here's pics of the 2 that I have: