I dressed my mare as Clifford the Big Red Dog from the childrens book series. The girl who owns Clifford in the books actually rides the dog so it worked really well. The costume was very easy to make; red polarfleece made into a sheet, neck cover, leg wraps, and tail wrap. Then we used more fleece to make big floppy ears and trimmed the ears with a fur boa. A big collar with a yellow fleece "tag" that said Clifford completed the look. People at the show loved it!