If We Don't Have Wings...
...then we have a valid reason not to fly.
If you want to base all your decisions on the shape of your body alone, that is.
As it stands, I don't think the problem is that we eat meat, it's how much meat we're eating.
Meat has gone from being a luxury item to being part of almost every meal we eat, and there's no historical precedent for that which I'm aware of, certainly not for the general population.
The industrialisation of meat production, and consumption, is neither time-honoured nor a natural state of being. It's making us fat, it's a disease risk and it's not 1/10th as energy efficient as plant farming.
Also, our guts, being long and convoluted, and in discernible stages, are closer to cows than wolves. That's why too much meat makes us constipated, for example.
If you're going to commit the natural fallacy, do it for the whole body, not just the teeth.