Poor Digi. I've heard of people feeding their dogs vegetarian diets, and having their dogs do well on them. One of my co-workers in the past had an Anatolian Shepherd that had similar digestive issues to Digi from the sounds of it, and she had success with a vegetarian kibble (this one, but I'm not sure of the quality. She liked it a lot though.). I'm not sure how comfortable I'd be with such a diet, but if Digi really can't tolerate most meats, then perhaps that is something to look into.

Taste of the Wild Pacific Stream might work though, if she does well on fish:

Ingredients
Salmon, ocean fish meal, sweet potatoes, potatoes, canola oil, salmon meal, smoked salmon, potato fiber, natural flavor, choline chloride, dried chicory root, tomatoes, blueberries, raspberries, yucca schidigera extract, Enterococcus faecium, Lactobacillus casei, Lactobacillus acidophilus, Saccharomyces cerevesiae fermentation solubles, dried Aspergillus oryzae fermentation extract, vitamin E supplement, iron proteinate, zinc proteinate, copper proteinate, ferrous sulfate, zinc sulfate, copper sulfate, potassium iodide, thiamine mononitrate (vitamin B1), manganese proteinate, manganous oxide, ascorbic acid, vitamin A supplement, biotin, calcium pantothenate, manganese sulfate, sodium selenite, pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, riboflavin (vitamin B2), vitamin D supplement, folic acid