I get a pretty bad vibe around Rickon. We see Shaggydog often opposed to the people at Winterfell, at Summer and Greywind, at Robb and Bran. Rickon was more or less abandoned by his family and he wasn’t exactly even-tempered to begin with. His wolf started out as grey and was the only one to darken to black. And then his green fire demon-eyes are mentioned repeatedly. AGOT Bran IV Summer snatched table scraps from Bran's hand, while Grey Wind and Shaggydog fought over a bone