"rotties should be about 120-175 i believe"

Remember that there can be some quite drastic variations even in pure breeds. I had a Dobie that never got over 40 lbs. Maybe she was the runt or sumpn - don't know. Other than her size, she was perfectly proportioned. I bred her with a red & all of her pups came out black so she must have been a 'blue' (pure bred black at least 3 generations).