Before you read this article, you may have thought your dog had the grossest eating habits ever. But Fido's penchant for poo is nothing compared to some of these sickos highlighted in Cracked. For example, Victorian scientist William Buckland: He didn't just stop at the meat of animals, either. While on a visit to St. Paul's Cathedral, a strange mark was found on the floor. A debate broke out as to what the stain could possibly be, at which point Buckland got on his hands and knees, licked the stain and confidently announced it to be bat piss. But the craziest thing Buckland ever did, at…