Flesh eating slugs

Flesh Eating Slugs are presumably slug like creatures that eat flesh, but may also have an affinity for cabbages: "They're ruinin' the school cabbages," - Rubeus Hagrid, Keeper of Keys and Grounds at Hogwarts. In ''Harry Potter and The Chamber of Secrets," Harry goes to Diagon Alley to pick up his school things with the Weasleys using floo powder. He does not say 'Diagon Alley' clearly, however, and ends up in Borgin & Burkes in Knockturn Alley. After a close shave with his archenemy from school, Draco Malfoy, and his father, Lucius, he gets out of the store and runs into Rubeus Hagrid, the gamekeeper at Hogwarts, and a close friend of his who is buying Flesh Eating Slug Repellent.