Watching Seven Pounds today, starring Will Smith, there’s a scene where he laughs at the notion that a big dog could live on “steamed broccoli and tofu.” I’m thinking about feeding my dog, Redford, a rescue, vegetarian dog food. I already know he likes plenty of vegetarian foods—including grass, which he eats assiduously every day…but worry that it’s not natural, or healthy, for me to impose my ethics on his tummy.

Can dogs be vegetarian? I’ve checked out a bunch of sites, including PETA, but most seem pretty biased.