Canis Lupus

Here is a New York Times blog post about wolf hunting. This passage puzzles me:

Unsurprisingly, I believe it is wrong to inflict pain and death unnecessarily on a creature capable of suffering. (Peter Singer more broadly examines the moral standing of animals here.) While this belief might not compel us to be vegetarians, it does demand significant changes in the way we raise animals for food, and it forbids wolf hunting as a form of entertainment.

Why does this belief not "compel us to be vegetarians"? Is meat-eating necessary? If so, in what sense and for what purpose? How much do you want to bet that Randy Cohen eats cows and pigs?