Crudite, Devo?

When I'm at the chopping board, Devo sidles up to me and waits patiently. I never give him a scrap of meat. I always give him a piece of fruit or a vegetable and wait for the day that he'll refuse it. He never does. He does not jump or wag his tail or drool. He always has the same look on his face. "Thank you, mistress, for that delicious cherry tomato. I will wait patiently for perhaps a grape or a piece of lettuce".