humans have canine teeth
you argue that humans have canines therefore we are supposed to eat meat
The presence of canine teeth does not necessarily determine an individual's diet. Many other animals, such as herbivores like cows and horses, also have canine teeth, but they do not eat meat.
Biologically and physiologically speaking our bodies are more closely aligned to herbivorous animals than omnivorous animals. The fact that our intestines that are an average around three times longer than that of the average omnivore, the fact that our jaws grind side to side when we chew, like the jaws of herbivorous animals, and the fact that the hydrochloric acid in our stomach is comparatively weaker to carnivores but also omnivores as well all point to that. But in fact, it really doesn't matter if we are herbivores or omnivores: just because we can physically do something doesn't mean that we are morally justified to do so.