We got a new foster today. She whelped a litter 6 weeks ago and tryed to eat the puppies so she hasnt nursed or anything. She is also HW+. What I need to know is any special considerations besides the picking up poop and activity level AND how much to feed. Shes about 40-50 pounds and shes a shepard mix. They gave us Puppy Chow and canned Natural Balance Lamb. How much should we feed?