Lorraine
Dogs and wolves are the same species. Wolves and dogs can breed and in order for two animals to mate they have to be part of the same species. In 2021, a literature review of the current evidence infers that domestication of the dog began in Siberia 26,000-19,700 years ago by Ancient North Eurasians, then later dispersed eastwards into the Americas and westwards across Eurasia. You state that both dogs and humans have evolved for the past couple thousand years yet you never stated what changed. Dogs teeth are still designed for killing prey and tearing meat. Dogs so not have the teeth of a Herbivore made to eat plant material. Forcing a dog to eat all plant matter is no different than forcing a deer to eat all meat products.