Wild horses go in herds: they have a chief who marches at their head, whom they confidently follow, and who gives the signal for flight or battle.
"The sheep which we have raised follows us, but it follows in company with the flock in the midst of which it was born.

It regards man AS THE CHIEF OF ITS FLOCK....

Man is regarded by domestic animals as a member of their society.

All that he has to do is to get himself accepted by them as an associate: he soon becomes their chief, in consequence of his superior intelligence.

He does not, then, change the NATURAL CONDITION of these animals, as Buffon has said.