He says there is no need of screaming at any animal.

It only frightens and angers them.
They will mind much better if you speak clearly and distinctly.

He says there is only one thing an animal hates more than to be shouted at, and that's to be crept on--to have a person sneak up to it and startle it.
John says many a man is kicked, because he comes up to his horse like a thief.

A startled animal's first instinct is to defend itself.

A dog will spring at you, and a horse will let his heels fly.