Health reasons. I lost 50 pounds, and no more career-threatening shoulder pain.

Weirdest side effect: Mosquito bites no longer itch

They're a cat.

You’ve never seen cats near a house plant?

Cats will practice herbivorism strictly only when it comes with an opportunity to annoy a human.

Heh. Technically not true, but practically yes.

If I recall, they can handle about 5% veg in their diet.

The funny thing is that wheat grass at the supermarket is cheaper, larger, and in better shape than the “cat grass” as the pet store and it’s the same stuff.