I adopted a "lab mix" from the pound today. She is approximately 5 months old and weighs 36 lbs. I have read through several websites and I am still not sure how much to feed her. I know I am supposed to feed her twice daily, due to her age. But the amount seems to vary anywhere between 1.25 cups/feed to over 2 cups/feed of dry food. I know labs have a tendency to get overweight, and I don't want to overfeed her. How much should I be feeding her each feeding?