Dress your dog up for any occasion, including Halloween and holidays. Don't miss out on limited-time holiday specials for this year's hottest trends in dog outfits. Shop for the latest seasonal dog costumes and accessories, as well as seasonal tees, pajamas and onesies at PetSmart. Online and in stores, you'll find a full range of costumes for small breeds, plus large dog outfits designed to bring out their inner super hero. Find dog costumes or accessories that are a perfect fit for your pup!