Today I am going to be posting pictures of guinea pigs in adorable Halloween costumes. If you have or are planning to get a pet guinea pig you probably shouldn't dress them up for Halloween because they probably won't like it too much. Guinea pigs are protective animals and wouldn't at all enjoy going around in Halloween costumes and collecting candy. Just because you can put your guinea pig in a Halloween costume doesn't mean I that you should. Although it is cute to look at pictures of them in cute costumes!