American Eskimos

i just bought my dog about 3 weeks ago. when i bought him the guy at the pet store said the dog was a mix breed with american eskimo/chiuhauha/ and a bigger breed dog but he didnt say what. now the dogs hair is short and feels like a american eskimo so i can see that in him, when i look at my dog when hes upside down he reminds me of a chiuhauha kinda weired. ok so now the bigger breed, i think my dog looks like a pitbull because hes a brindle color. please send me your thoughts. my dog has big paws for his size but kinda short legs. when i bought him the guy said he wasnt gonna get much bigger but i think different.