When out in the world, often a user encounters a group of cows, sheep, or other passive mob. These groups are often killed for resources. When a player attacks an animal, it runs in a frenzy away from the user, but animals around it remain calm and continue with whatever animals do in their free time. I think a good addition would be that when one animal is attacked, all animals in a certain radius will also flee, making hunting small groups much more difficult and interesting. Perhaps all animals in a 12-block area will flee? This is just an idea to make animals more realistic and harder to kill off.