Need Help with my mix Breed!

  
REPO

Ms. Pooter
 
 
Barked: Sat Jul 7, '12 9:24am PST 
Repo girl is 6 months old and weighs 55lbs and growing lol. She loves water, running, and playing. She has learned alot of things within a month of us having her.(Her name,potty trained, and commands) We got her from the pound when she was 5 months old. She only weighed 35lbs, so we can asumme she is gonna be a big dog. The pound listed her as a shepard mix. But her colors throw me off as trying to figure out what else she has in her. She seems to be protective in our home and in the car. She is a sweet as can be when we are with her, But she does have her moments of when she wants to be left alone. She does not like small animals and tries to get them..She even tries to show dominece towards me but I let her know very quickly who the boss is..lol.. We took her to the Vet for her first Check up and they really did not know. She has a very fine coat, her colors are tan, white and black..Her stomach is odd looking cuz it has like black spots on it..Please let me know what you think.