What food do you recommend for pregnant females?

It is important to understand that I am not a fan of 99% of the commercial dogs foods on the market. If you want to get revolted, get a copy of The Nature of Animal Healing by Martin Goldstein, D.V.M. and read what most commercial dog food is made from. Goldstein is an excellent author and this is a good read. I was surprised to find a health book that I looked forward to reading before I went to bed at night.

Pregnant females that are fed a natural diet come very close to getting all of their nutritional needs met. It is important for a pregnant mother to get folic acid (the same as in humans) and one of the best sources of this is raw beef or calf liver. Liver is also an excellent source of vitamin A and D. I would give it to your females two or three times per week. If you feed cod liver oil on a regular basis, you may want to cut back on this during the time that you feed extra liver.

Just before the bitch whelps it is not a bad idea to modify her diet so her stool is a little softer. Liver and vegetables grown above ground will help accomplish this. Cut out on the bones and below ground vegetables

If you are in the habit of fasting your pets, it is not recommended to fast a pregnant bitch.

The bottom line is that if you want a healthy litter, get your bitches off of commercial food and feed them a good natural diet. If you want to learn how to do this (which is how I learned), buy a copy of Kymythy Schultze book titled Natural Nutrition for Dogs and Cats - this is an excellent book and very inexpensive.