In the winter, pig feed is less for the prevention of vitamin deficiency in pigs.

Vitamin A deficiency. Dry skin, dull body, indigestion, loss of appetite, slow growth. Some have weak vision and nervous disorders. Severe convulsions, circling, gait instability, movement disorders, and even hindquarters paralysis can occur. This disease occurs in sows, which can easily lead to miscarriage or stillbirth. The piglets born are blind, and the piglets that are born have a normal shape and are weak and prone to death. Control: 20 grams of pine needles can be used, simmered in juice or decoction, once in the feed, once a day, even for several days; can also feed more carrots, silage and other vitamin A-rich feed.

Vitamin B deficiency. Growth retardation, vomiting, skin rash, hair loss, etc. In the absence of pantothenic acid, poor appetite, poor growth, diarrhea, cough, hair loss, movement disorders, especially in the "goose step"-like posture. When niacin is deficient, appetite disappears, weight loss, severe diarrhea, dermatitis, skin cracking, black suede, nervous disorder, anemia. Prevention: When preparing daily feed, pay attention to the full supply of vitamin B-rich feed. If corn is used as a feed for a long time, it can cause niacin deficiency. It should reduce corn in feed and increase bran, silage, germinated feed and tuber juicy feed.