I can haz costume? Actually this may be more along the lines of “do not want.” We just assumed that cats really hate dressing up for Halloween and now we have concrete proof that they do. Costume Cats shows off cats in their angriest form, dressed in costume. While we assume that this pictures are the last known photos taken by the owners before their cats viciously attacked them, we get to enjoy the benefit of seeing all of these adorable cats in costumes without having to take the risk of dressing them up ourselves. The site's got everything from cats in silly hats to cats in full costumes.