Changes in feed odor can also affect pig feeding
1. Changes in flavoring agents: For example, the conversion between frankincense, fish-shaped, fish-flavored, and sweet-smelling, or exposure to air for too long, so that the smell of volatile lighter, will affect their intake.
2. Feed moldy deterioration: If the feed is contaminated by mold, moldy feed will produce moldy taste, both from the smell and palatability will make pigs feed intake decreased.
3. Feed rancidity: high ambient temperature or long storage time of feed, crude fat in the feed will be oxidized and rancid, appear hala taste, so that its feed intake decreased.
4. The difference in the type of oil: If soy oil, corn oil, etc. are added to the feed, the smell is not the same. If it changes, it will affect the feed intake.
5. The influence of special odors of other raw materials on the feed: such as the content of fishmeal and the quality of the fish meal.
Some feed ingredients directly affect the physiological response of pigs, resulting in a decrease in feed intake
1. Amino acid: The feed intake of pigs increased with the increase of lysine levels in the feed, but after a certain degree, the feed intake decreased.
2. Minerals: The lack of zinc and phosphorus in the feed and the excess of calcium, manganese, and iron can all result in poor appetite.
3. Vitamins: The lack of vb1, vb2, vb12 and niacin and pantothenic acid will reduce the intake of piglets.
4. Antibiotics: A large number of tests have shown that adding a small amount of antibiotics to the pig diet can increase pig feed intake by 7%-15%.
5. Moisture: In the early stage of water shortage, the pig's appetite decreased significantly, especially if it did not like to eat dry powder. With the increase of water loss, the pig's appetite may be completely eliminated.
6. Energy: The high energy content of feeds has a low intake, whereas low energy values ​​have a high feed intake.
In addition, some pig diseases such as parasitic diseases, colds, gastroenteritis, etc., changes in pig house temperature, swarming, laps, restocking, and epidemic prevention during the pig raising process will affect the feed intake of pigs. .
Feed palatability factors
1. Wet and dry problems: There are three kinds of feed materials for pigs, namely dry powder, wet mix (water 1:1) and thinner. According to experiments, feed intake by wet feed is the best, and feed intake is the worst.
2. Grinding material: The corn grain size requirement is 0.8-1.5 mm, and the fine material palatability declines, thus affecting the feed intake.
3. Crude fiber content level: If the crude fiber content in the feed is greater than 6%, the pig's feed intake will decrease.
4. Salt: The demand for salt in normal growing pigs is 0.45%. When the salt content drops to 0.2%, the feed intake of pigs can be reduced by 20% and the weight gain can also be reduced by 38%.
5. Sweeteners: Pigs prefer to eat sweet taste, such as feed containing sweeteners, feed intake increased.
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