I only kill what I'm going to eat, and I feel that should be a rule. Crow hunting is ridiculous. Coyotes eat mostly rabbits, mice and bugs and stuff. Deer are a very small part of their diet, and shooting a coyote isn't going to make any significant difference to your game hunting. Same holds true with wolves. Yes, they take deer, but if you do the math, they don't take enough to significantly affect deer hunting.