What Is My Lab Mixed With?

My Lab mix is a rescue and the closest I can figure out is Australian Shepherd Lab mix. However, she is 62lbs at 14 months. She has a white belly, a ring around the nose, and some of her paws. Her coat is "dark chocolate" like black mixed with brown, back legs have a lighter brown mixed in.

She has the Lab webbed feet. Her coat and tail are all short coat. Her tail doesn't hang down, but almost just sits level with the ground.

By Caleb