-Increased animals' attack reach distance, damage and move speed.
-Changed animals to only help nearby attacked animals of the same species when they can see them (to ease butchering in domestic farms).
-Changed animals to panic when pushed by a player (backported from BTW CE 3.0).
-Endermen now sometimes try to teleport their attack target when they can't reach them.
Note:
0.3.1-fix fixed an issue where endermen sometimes teleport targets into the void, and changed summoned mobs to no longer drop loot.
The next update will be Special Mobs, adding new mob variants to the game.