You CAN avoid meat completely under 2 circumstances, if you are vegetarian, you just need to consume eggs and fish (some milk too) as a vegan you need to consume fortified foods, although you need to take care whether it was fortified from an animal source or not (if you consider bacteria as animals, then tough luck).
Anyway, considering my lunch today was two greasy duck legs on red cabbage with dumplings, I won't ever be the correct person to tell people what to eat or not. To ease my mind, it had lots of garlic on it^^