What kind of dog do i have?

i recently got a puppy from the local humane society and have had him for about 2 months or so and i'm starting to question what kind of dog breeds he might have in him. He's a mutt and is about 3 and half months old so i'm pretty sure he's not done growing but he is a light golden brown color with white patches on his chest and feet. He has a slightly thick coat, about a inch in length and its very soft and smooth with straight hairs. He's about 20 pounds or so and about 2 and a half feet long on all fours, standing up he's more like 3 or more feet. He also has a thing head with a thin snout, he almost looks like a fox with a slightly thinner tail. I guessed chocolate lab and something but his face, body shape and size just doesn't seem to match up. His name is Wyatt and he's full of energy and love and is very smart. If anyone would have any suggestions i could look into for what kind of breeds he might have in him it would be greatly appreciated. Thanks!