MULE IN DEFENSE MODE
Below you will see why even a good sized Donkey makes an awesome guard animal for sheep, etc. Also why a mule should be trained with "Kindness", not brutality because if a mule ever decided to get even, it wouldn't be much fun!
These pics came from a guy in AZ. Yes, the mule killed the mountain lion. The lion had been stalking them for the better part of the morning, on the way out to a hunt. The mountain lion probably intended to kill one of the dogs and have the dog for it's lunch. The cat ambushed them, and the mule tossed its rider and went into attack (defense) mode, the horses scattered and shots were fired but no one was sure if they hit the cat or not. It wasn't until it was almost over that one of the guys started snapping pics. The mule stomped the cougar to death after biting and throwing it around. The dogs wouldn't even come close until the mule settled down.
The mule is defending not only itself but the dogs, the people and it's equine companions, the other horses.
The mule stomped the cat then pinned it to the ground and bit the heck out of the cat several more times.
The cat was dead by now. The mule picked up the cat again, whipped it into the air again, then stomped the cat again for good measure!
Note the dog audience....who were not a bit of help from an attacking mountain lion. Then they wisely stayed back because of the rampaging mule.