I agree about the wolves, they're far less interesting and used in the show. But I imagine that has to do either with cost or insurance/risk reasons. I mean, to be honest it's hard to tell if the wolves used are real or CGI at times. If CGI, that's expensive. If real, that's risky for actors and potentially time-consuming to get correct. I imagine it's entirely a cost decision. Unfortunate, since it's vastly intriguing in the books to compare the Stark kids and their dogs and such; adding another dimension of mystery and trying to predict what happens to one's fave characters.
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