lab puppy 5months old throwing up

Question
chocalte lab puppy 5 months old female
We took Princess to the vet got get spayed on march 24, 2008.  Ever sence then she has been throwing up after she eats and drinks.  Called the  vet several times, finally took her to be checked.  The vet could find anything wrong with her.  She is eating 1 cup of Purina puppy food for large breed in the moring and one at night, and has been drinking plenty. She still is sick. Help

Answer
That shouldn't be.  Try a bland diet for a week.  

If a dog is having trouble keeping anything down or continuing diarrhea try this out of the manual I have from a large, knowledgeable dog guide school.

Bland recovery diet for dogs.

3 parts cooked rice, one part boiled hamburger or chicken, or cottage cheese. I think you can substitute boiled potatoes for the rice. Once in an emergency, we bought a plain baked potato from Wendy's.

This is meant for short time settling a dog's digestive tract. It is not the complete and balanced diet they need long term. I have seen it work.

Once her digestive tract settles down, start mixing in Purina adult chow until after another week it is all dog chow.  Switching to adult chow now has nothing to do with her problems, but will slow her growth and give her joints time to develop under less stress.  For the same reason, keep her lean.  Evaluate the dog as illustrated in this link, http://www.longliveyourdog.com/twoplus/RateYourDog.aspx  You may want the vet to confirm your judgment. Adjust the dogs food and exercise as needed to reach its ideal body condition.