Grown herds will now attack whoever damages them. (Including monsters, so use herds for your advantage :D)
Attacking a grown member of herd will cause them run away for a while, then turn back to attack the attacker.
Babies in herds will not attack, but attacking them will irritate adults.
Llamas do split.
The others do melee attack.
Melee attack does 1 1/2 hearts per punch. (in hard mode)
Tamed llama, horse, donkey, mule do protect themselves & their owner from whoever damaging.
Bedrock only.
Download .mcpack and double-click it to install.
Hasn't tested in other versions, but it might work.