When you have clostridium, you may have them on several weeks of antibiotics.
I am giving you a link about clostridial diarrhea:
Flagyl is Metronidazole, and Noevast is a sulfa type antibiotic.
I would be curious to know if other tests were done. She has been so sick, I wonder if blood work, and other fecal tests would be appropriate Optimal antibiotics for the treatment of canine C. perfringens-associated diarrhea include ampicillin, metronidazole, and tylosin. When clostridium is found in large amount, you have to wonder about underlying gastrointestinal disease: bacterial like Salmonella, Camphylobacter certain E.coli (from the raw food even if the other dogs are fine), viral (are they all vaccinated and up to date?), inflammatory bowel disease (IBD), SIBO (Small intestinal bowel overgrowth), pancreatitis, liver/gall bladder disease.
I do not have all the information to tell you the Clostridium is the only culprit here. I do not have her metronidazole dose, and i do not have all the details of her hospitalization. But if it is and she is on her way to recovery, supporting her nutrition is really important. I would make sure she has a multivitamin/mineral supplement. Some dogs do well on digestive enzymes and probiotics (Rx Vitamins make good ones for pets). Some dogs that have chronic clostridial diarrhea may respond to added fiber in there diet. Some dogs need a food trial on different protein they are accustom to in case they have IBD.
Let me know if you have more questions, or if you need additional information.
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