Lump

Lump is a male Snafflefang in How to Train Your Dragon 2, who lost his right leg to an iron trap made by Drago Bludvist and his trappers. He was eventually rescued by Valka, who cared for him along with other injured dragons in Dragon Mountain, such as Gruff and Thump.

Appearance
Lump resembles an ordinary Snafflefang with blue scales and red spots, except for the fact that he had lost his right leg to an iron trap. Despite his missing leg, Lump is very active, playful, and friendly towards anyone in Dragon Mountain.

Behaviour
Lump appears to have recovered both physically and mentally from the loss of his leg. He is naturally curious and welcomes other new dragons. This friendly dragon even sniffed Hiccup and Toothless friendly when they came.

Trivia

 * In Rise of Berk, Lump has both of his legs.