I know this is a VERY old post, but many people like me are searching for answers to help their cats and or kittens. Fish Mox, Fish Azithromax and Fish Flex can all be found... of all places... on ebay... Make sure to get the premium or pharmacy grade of the product, and check around the net for...
Ok so first things first, "solid food" may be too much for her little belly and only exasperate the problem. Try taking a quality dry kitten food, and either grinding it to a powder, or mixing it with KMR and let it soften you cal also use water for some of the feedings, and milk for the others...