Jillie, you'll find a stellar one here
at the Friends of Wylie Chihuahua gallery. Follow the link at the bottom of the page.
I wish I knew how to expand the thing, I'd love to knit for my beagle, Owen. Thing is, he's a bit on the...husky side. We've had him two weeks (rescue dogs rock!) and we're trying to get him slimmed down. When he came into the rescue program from the shelter he was about 50lbs... mostly muscle, but still... he's only a 15" beagle.