I really love how you put in a new familiar which isn't flying, and I love how it's a Fox, but regrettably the model has some issues. First of all the tail is bad, and the model is jankey, it stutters & vibrates, it's not good. So I propose that the Arctic Fox gets changed to....the Fox. There's a really great model for the Fox, and it doesn't take any great leap of the imagination to Swap out Arctic Fox for regular Fox.
Also a tiny Spider, a Toad (the Codi version), or a Dire Rat would be awesome as familiars, and would fit really well with the Transylvania horror theme of Ravenloft.