Possibly the dangerous Dracula kind. I haven't actually met any yet.
I'm not the biggest fan of pets in general, but that weasle is an adorable little fucker.
The guy covers his tracks. None of the animals I've caught him selling are listed as restricted animals. Some of them our people can't even identify, like the lizard he called a basilisk or the giant ugly eel thing he called a mermaid. All of LA got a taste of the asexual bunnies though. They seriously shut down the entire city.
It's gotta be drugs though. The couple who bought the first asexual rabbit thought it was their daughter, and the man with the "mermaid" thought it was his wife. I also saw him leave a party one time with this girl and she turned up days later high as a kite.