I just got a 14 week puppy. She is underweight 10.9 as I can easily feel her ribs and hips. I started feeding 1 cup a day...to 1.5 cups. Now I give her 2 cups day. She saw the vet, all is fine, but she is very active with my other 1 year old beagle. So my plan was to keep feeding her 2 cups till she starts to gain weight, then slowly back off.