This section of the book is from the "Stories of Animal Sagacity" book, by William Henry Giles Kingston.
I have heard of a donkey which on one occasion bravely did battle for himself.
He happened to be feeding near a river when a fierce bull-dog attacked him; but so gallantly did he strike out with his heels, that his assailant was unable to fix on him. At length the ass suddenly turned round and seized the neck of the bull-dog in his teeth. The dog howled with pain, and struggled to get free, but the ass had no intention as yet of letting it go. Holding it tight, he dragged it struggling into the water, going in deeper and deeper; then kneeling down where the depth was sufficient for the purpose, he kept the dog under the surface till it was drowned.
Whenever you are attacked by a spiritual or moral foe, imitate the brave ass, and drown it.