Remember when karakuls used to do this?

[JemC]

I'm still not sure why they did away with unique mob mechanics, it was a really cool feature.

At a guess they were trying to cut lag or reduce the game's download size?

[DSX]

At a guess they were trying to cut lag or reduce the game's download size?

It was because they deemed it "too stressful" as these mobs would engage (in aggressive or friendly manner) you regardless of what you are doing or if you wanted to engage them.