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Several feed types that should not be fed to sows, or should not be fed in large amounts

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1. Distillers grains. Although distillers grains are rich in crude protein and crude fat (especially dried distillers grains, whose crude protein content reaches 2%-25%), they lack carotene, vitamin D and calcium, and also contain a certain concentration of alcohol. Therefore, it is not suitable to feed large amounts to pregnant sows and lactating sows, otherwise it easily causes pregnant sows to miscarry and to give birth to stillborn or weak piglets. Even if piglets are born, they are prone to diarrhea. 2. Starch residue. Starch residue is a by-product of making starch or starch noodles from raw materials such as peas, adzuki beans or potatoes. It contains very little crude protein and starch, and is of poor quality.

1. Distillers grains. Although distillers grains are rich in crude protein and crude fat (especially dried distillers grains, whose crude protein content reaches 2%-25%), they lack carotene, vitamin D and calcium, and also contain a certain concentration of alcohol. Therefore, it is not suitable to feed large amounts to pregnant sows and lactating sows, otherwise it easily causes pregnant sows to miscarry and to give birth to stillborn or weak piglets. Even if piglets are born, they are prone to diarrhea.

2. Starch residue. Starch residue is a by-product of making starch or starch noodles from raw materials such as peas, adzuki beans or potatoes. It contains very little crude protein and starch, and is of poor quality. Feeding it to sows in large amounts often causes emaciation and low milk yield, and also easily causes diarrhea in sows. Long-term feeding can cause sows to give birth to stillborn and deformed piglets, and the piglets born are poorly developed and prone to skin diseases. Therefore, starch residue should not be used to feed sows; if it is fed in small amounts, it must be supplemented with protein feed, green feed and calcium, etc.

3. Molasses residue. Molasses residue is a by-product of the sugar industry, has a sweet taste, and contains sugar, starch and protein. It can be used to feed growing pigs. However, pregnant sows must not be fed molasses residue, because molasses residue contains 55% potassium salts, which have a strong irritating effect on the gastrointestinal mucosa of pigs, have a very strong laxative effect, and easily cause diarrhea.

4. Corn and sorghum. Feeding sows mainly on corn and sorghum in large amounts over the long term will reduce the conception rate of sows, cause stillborn and weak piglets, and even produce hairless piglets. Therefore, when corn and sorghum form the basis of the diet, various green feeds, high-quality wild dried grass meal, fish meal and other feeds rich in riboflavin should be added. In winter and spring, when green feed is relatively scarce, corn, soybean cake and other feeds can be fermented before being fed to sows. In addition, feeding should be changed from cooked feed to raw dry feed, and at the same time an appropriate amount of alfalfa meal, peanut cake, bran and other feeds rich in pantothenic acid should be added to the diet.

5. Carbohydrates. If too many carbohydrates are supplied, sows deposit large amounts of body fat, making them overweight, with low libido, difficulty coming into estrus, repeated mating without conception, and susceptibility to difficult birth, stillbirth and small litter size, etc. Trials have shown that when the daily metabolizable energy of sows rises from 25.1 megajoules to 29.3 megajoules, the number of piglets born decreases by 1.9. Therefore, sows should not be fed a high-carbohydrate diet.

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