I have been trying to get rid of these buggers for years. The are smallish, do not have the typical rat shaped head and have fancy white markings. I think they are feral but I still want them gone. I found two babies drowned in a SMALL water bucket. Although wild rats sometimes drown in buckets too, these do not seem to be as "smart" as wild rats. Not saying that domesticated rats are stupid, they just have not had to survive in the wild for thousands of years.