1, see the action. Healthy pigs keep swinging their tails and respond quickly and sensitively to external stimuli. Healthy adult pigs bulimia sleep well. If food is given, it will come and sound. After eating, it will let the sleeping person fall asleep. When a stranger approaches, he stands up and raises his eyes. If the pig is found to be apathetic, sluggish in action, often lying in the ground, refuses to eat, the back is stiff, walking is shaking, and head and tail drooping, it is a sick pig. 2, look at the skin. Healthy pigs have smooth, round skin and plump muscles. If the pigskin is rough and lacks elasticity, swelling, ulcers, erythema, and plaque are the symptoms. 3, look hair color. Healthy pigs are light and moist, and if pig hair is rough, lacks elasticity and disorder, it is the performance of sick pigs. 4, see the nasal tray. Healthy pigs have a sweaty ball on the nose. If the pig's nose is dry without sweat beads, there is a large amount of mucus overflowing from the nostrils. This is also the performance of sick pigs. 5, look at the eyes. Healthy pigs have bright eyes and eyes; if pigs are found to have dark eyes, redness, and too much eyelids, it is the performance of sick pigs. 6, see the neck. Healthy pigs have smooth head and neck movements and no swelling; for example, if the pig's head and neck movements are not as smooth or swollen and hardened, it is the performance of sick pigs. 7, see breathing. Healthy pigs normally breath 10-20 times per minute; if the abdominal breathing is too fast or too slow, it is not normal. 8, see the tail. For healthy pigs, the anus is clean without feces; if the pig's anus and its surroundings are found, even if the tail sticks with thin feces or the rectum recedes or the tail droops do not move, it is the performance of sick pigs. 9, see posture. Healthy pigs sleep on many sides and breathe in the form of abdominal breathing. If a dog is sitting and breathing, it is the performance of a sick pig. 10. Listen to the sound. Healthy pigs make a loud call; if they croak, they are the performance of sick pigs.