(FIXED)

Hello Minecraft community. I need some help. I was in my world, ready to build an Ender man farm when all of a sudden a Killer Bunny attacks me in The End. Aren't they meant to be spawned only by use of console? They drop me command block when I kill them and do stupid loads of damage. Is this a bug? What should I do? I wanna get rid of them.

UPDATE: I just reinstalled the game after backuping my worlds. My game was in fact corrupted (I think someone hacked it and pulled a cheeky prank), I dunno how or why tho... When I came back in the fresh new installation the bunnies weren't spawning on their own and the ones remaining didn't drop anything, so I managed to clear the main island. Something was compromised, but at least my world is fully intact.