What are the simple methods for identifying sick pigs?

1. Watch the movements. A healthy pig's tail keeps swinging, and it responds quickly and sensitively to external stimuli. A healthy adult pig is greedy for food and fond of sleep. If food is given, it will come at the call; after eating its fill, it lies down and dozes; when a stranger approaches, it stands up, raises its head, and keeps wagging its tail. If a pig is found to be listless, sluggish in movement, often lying down and unable to get up, refusing to eat, with a stiff back and unsteady walking, and with its head and tail drooping, then it is a sick pig.

2. Look at the skin. A healthy pig has smooth, round skin and full muscles; if the pig's skin is rough and hard and lacks elasticity, with swelling, ulcers, red spots, rotten patches, etc., these are signs of disease.

3. Look at the coat color. A healthy pig has a glossy, lustrous coat; if the pig's hair is rough and hard, lacks elasticity, and is messy, this is a sign of a sick pig.

4. Look at the snout disc. A healthy pig has a moist snout disc with beads of sweat; if the pig's snout disc is dry with no sweat beads and a large amount of mucus spills from the nostrils, this is also a sign of a sick pig.

5. Look at the eyes. A healthy pig has bright, spirited eyes; if the pig's eyes are dim, red, and have excessive eye discharge, this is a sign of a sick pig.

6. Look at the neck. A healthy pig moves its head and neck freely, with no swelling or hardness; if the pig's head and neck do not move freely or there is swelling and hardness, this is a sign of a sick pig.

7. Look at breathing. A healthy pig breathes normally 10-20 times per minute; if abdominal breathing is too fast or too slow, it is abnormal.

8. Look at the tail. A healthy pig has a clean anus with no feces; if the pig's anus and its surroundings, or even the tail, are stuck with loose feces, or the rectum protrudes from the anus, or the tail droops and does not move, this is a sign of a sick pig.

9. Look at the posture. A healthy pig mostly sleeps on its side and breathes with abdominal breathing; if it sits in a dog-sitting posture and breathes with its mouth open, this is a sign of a sick pig.

10. Listen to the sounds. A healthy pig makes loud and clear calls; if the calls are hoarse, this is a sign of a sick pig.