I would supplement their diet with an old recipe that many of us have used for years. Although I am not experienced with Chi's, I am sure this formula will work for them as well. I mix one can of plain evaporated milk with one can of boiled or distilled water. Mix in one egg yolk whipped intil it's frothy, and one teaspoon of Karo syrup. If your babies can lap up the milk (feeding one at a time)from a small shallow container, good. If not, you may have to use a small baby bottle. If the pups have teeth, start adding baby rice cereal, and slowly progress to a good quality food, soaking it at first, and gradually feeding it drier. Provide water at all times for these pups, since they are tiny and can dehydrate very easily. The other condition to avoid is hypoglycemia. The pups must be fed at least every 2 hours a day. Good luck with the little guys, would love to see a picture!