It could possibly have husky in there, I would also expect a thicker coat being that both suspected breeds involved have thick double coats themselves.
You may have to wait till the onset of your next winter to see if the dog develops an undercoat, Huskies and Malamutes will also blow their undercoats at the end of winter which will come away in tufts all over looking a bit ferrel, time will tell I suppose but both breeds are extremely intelligent and not dominate making good family pets.
Going back and looking at the photos you supplied does show some conformation similarities with Siberian Huskies, especially the narrowness of the chest, leg length and ears.