Many thanks to Cockerlover,Tashabailey,cowanbree,& rysup,for your kind advise.I am comforted by your thoughts and am pleased to let you all know that Missy is once again eating well.
I think perhaps it was because of worms the she was off her food.The day she had a wormed tablet ,she was fasted for 24hrs and next day she came looking for food.I was remiss in not worming her before mating.I have not had this problem before only with bitches not eating after whelping.I had a couple that would only eat chicken necks and Nutragel for the first few weeks after whelping.Only problem was that the puppies looked like fat little toads.