Before anyone thinks of throwing a stone, you should know this is approved by both our vets. But even those against a vegan diet for dogs will acknowledge to having patients who have overcome certain ailments once placed on a vegan diet even if for only 1-2 days per week. Key is nutrition and the right balance. And there are multiple health reasons for considering a vegan diet for dogs.
My 11 year-old mate has a whole bunch of health issues. He's always had issues throughout his life. When he was 3 months old, he contracted parvovirus. He spent almost 2 weeks at the vet hospital and was very much touch and go for a full 10 days.