Most of my rat moms have decent sized litters, 10+ pups. As they lie there straddling the big pile to feed them, I can't help but wonder if there's something else I could be giving them during this time to give them an added boost to help keep up with those physical demands. Is there something I can give? I saw something somewhere about soy formula, but I'm skeptical about that one.

I feed Native Earth (Harlan) 4018.
Ingredients:
Ground wheat, ground corn, wheat middlings, soybean meal, corn gluten meal, soybean oil, calcium carbonate, dried brewers yeast, dicalcium phosphate, iodized salt, L-lysine, DL-methionine, choline chloride, niacin, vitamin A acetate, biotin, pyridoxine hydrochloride,thiamine mononitrate, vitamin D3 supplement, folic acid, menadione sodium bisulfite complex (source of vitamin K activity), vitamin E supplement, vitamin B12 supplement, riboflavin, calcium pantothenate, ferrous sulfate, magnesium oxide, manganous oxide, zinc oxide, copper sulfate, calcium iodate, cobalt carbonate, chromium potassium sulfate.

Guaranteed Analysis %:
Crude Protein (minimum) 18.9
Crude Fat (minimum) 5
Crude Fiber (maximum) 5
Calcium 1.01
Phosphorus 0.61

And give half a small Innova health bar a couple times a week as a treat.
Ingredients:
Turkey, Chicken, Ground Barley, Chicken Meal, Oatmeal/Rolled Oats, Potatoes, Rice, Chicken Fat, Herring, Flaxseed, Apples, Carrots, Cottage Cheese, Alfalfa Sprouts, Egg, Garlic, Vitamins/Minerals

Guaranteed Analysis %:
Crude Protein (min) 20
Moisture (max) 10
Crude Fat (min) 8
Crude Fiber (max) 4