Diy Sheep Costume For Dog . 4.0 out of 5 stars 2. 151 terrifyingly cute halloween costumes for pets. Zack & Zoey Lil' Sheep Costume MEDIUM from www.healthypets.com We've gathered the best of the best dog halloween costumes and cat halloween costumes to help you celebrate your favorite. Glue the ears to a plastic headband. If you click a link and make a purchase, we will.