Mobs hitting each other

[asamortal]

I've recently seen 2 mobs try to kill each other in /dropchallenge.
I wanna know how to trigger this myself.

It's kinda funny looking at them go at each others throats instead of doing it myself for once.

[asamortal]

I actually know how to do this now.

You just have to hit a Mature Tick while standing close to a Controlled Villager without aggroing the CV(This is pretty easy as long as you don't use any AoE attacks like Whirlwind or Magic Shockwave).
Once the Tick does its Whirlwind attack it will aggro the CV and the rest is history.