What Breed Is My Dog?

I'm trying to figure out what breed my dog is. I've had a lot off people guess many different breeds. She's about 35 pounds, small to medium height, hyper, smart, loving, protective, great with kids and other animals. She was abused and starved before I got her, so it's hard to tell if it's her nature to be shy or what came from her previous home. She has a crazy high jump for a little dog and she almost does the ferret war dance. She has picked me as the alpha and does not listen to the others in the household. She is extremely intelligent and hyper. She is a super fast runner, but will not leave my side unless frightened.