What Breed Is My Dog?

I recently rescued a 7 month old puppy from some lousy owners on Facebook. They told me the owners before them said he was Shepherd/Schnauzer mix, but they think he is Husky/Schnauzer mix. Now I am curious as to what he is mixed with. I can see the Schnauzer, but I'm not sure about the other breed. Please help. He's around 7 months old, black eyes, loves to play, smart, and has the hair of a Schnauzer. He also has long back legs, and his paws aren't very big. Thanks!