Can you feed your newborn gerbils whole milk?

Adults might not, but babies do. I recently had a runt in my litter who was clinging to life. Trying to save its life, I warmed up some cow's milk in the microwave and used my pinkie as a nipple. It actually worked! The little thing was sucking milk from my finger. It is now doing quite well and has grown up like the others. And all the mother did was lick the milk from its face.