They say Draco Malfoy is a ferret... Slytherin is of course a snake.
When Draco turned into a snake due to the Animorges transformation accident, a series of stories happened with Harry Potter, the only snake whisperer in the wizarding world.
Draco: It will change back!
Harry: Actually... It would be cuter to go back unchanged - I was wrong, stop fighting!
Intention: fandom