I have 2 pitbulls that both just had puppies. Together there's 16 pups, and my mammas are getting really skinny and weak. They're not as active, and i know they need extra nutrion. I already feed them high quality puppy food, and raw eggs. Can anyone else give me some things to feed them so they can have more energy and get more fat on them? or certain vitamens or minerals they need? Their puppies are almost sucking them dry! Please Help!