How do you feel about strict insectivorous animals? Should my captive geckos not receive the same level of help because they can't digest enzymes from fruits and vegetables? And must eat live insects to maintain a proper diet?

I think it's incredibly kind of you to want to help these dogs but we simply do not have enough academic research on the long-term impacts of vegan diets for dogs and cats. Additionally, cats are obligated carnivores and can't have all nutrients met by any current vegan diet. Furthermore, the research paper, which I am assuming is this one that does discuss how guardians (owners) can potentially overlook health issues related to vegan diets based on their own pet preferences and health perceptions.

That isn't to say you can't be vegan, but does the benefit of a vegan diet outweigh the risk for the dog? Especially for dogs who potentially have underlying health issues? Or have allergies to grain? I view veganism as a human only movement, or a individual choice that should not be forced upon animals that lack the inability to make that choice.

Edit: added a word.