(10) Rage and pretended anger are expressed by a sudden squeal, the signal of attack.
(11) Gestures of pain.
Stamping is merely impatience.
Pawing may be due to colic. If also the animal sweats and keeps looking at his flank, there is certainly pain in the abdomen.
Pointing with a forefoot. When standing, a horse rests his hind legs by changing weight from one to the other at intervals of a minute. As he has no mechanism to do this with the fore limbs, he expresses pain in one of them by pointing the foot forward. He rests better facing down a slope then facing up as in a stable, and when in pain may be relieved by tying to the stanchion instead of to the manger.
Dragging the fore foot means injury to the shoulder.
Head out, chin up, feet apart, and sweating, mean that the chap is choking.
Head down and tail tucked in, mean misery or sickness.
(12) Gestures of joy.