I have a female German Shepherd Dog and she's 6 months. I took her to get her 3rd set of shots recently and the doctor did not weigh her but said she looked to be approx 50-70lbs. She is currently eating Pedigree and I give her 3 cups, twice a day. Am i giving her the correct amount and also, Is her weight normal for a 6mth puppy. She seems to be a little bigger than i was told she'll be. How big can the females get?