What Breed Is My Dog?

I adopted my dog Lexie from a rescue 2 months ago, and can't figure out what mix of breeds she is. They identified her as a Lab mix, and her mom was a Golden Lab-mix dog. At first I thought Lab/Pit Bull because she is stocky, but she was majorly overweight when I adopted her. She is a big chewer, she loves to smell things and scavenge for food, is friendly with strangers, not that interested in other dogs, not a big barker, and a crate escape artist.

By Anna