The whip is suppose to be used on animals to heard them. It should not hurt them.
Grenades don't do damage to anything but enemies. I just didn't get around to fixing it for other things.
I made it so baby animals are invincible.
Llama might also be invincible? I kept killing mine on accident so I turned it off. I'll add it back some other time.
I think I actually still have the Llama breeding in the game. If two llamas are next to a nest they make babies. HaHa. I planned on implementing that for other animals just got busy making other things.