When accurately controlling the dose of spices used in mixed feeding, the dose of the drug used must be accurately calculated. If administered by feed intake, the average daily feed intake of livestock and poultry should be known in detail, and then the required drug dosage should be calculated; if the feed is administered according to the weight of livestock and poultry, the average weight of livestock and poultry must be measured by sampling to calculate the total population (field ) The number of body weights, then calculate the required dose. It needs to be emphasized that sampling must be random sampling. For chickens, first determine the sampling ratio based on the size of the flock. Generally speaking, tens of thousands of chickens should be sampled by 1% and small groups should be sampled by 5%, but not less than 50. When the chickens are sampled, the chickens are usually driven off first, so that chickens in different regions and chickens of different sizes are evenly distributed, and then the number of chickens required is randomly surrounded by barbed wire in any place of the chicken house. Weigh one by one; when sampling chickens in cages, they should be sampled and weighed from different levels of cages. The number of cages per cage should be equal.
Drugs and feeds must be stirred evenly, especially for drugs with smaller safety margins and smaller amounts of drugs. The commonly used dilution method in production, also known as hierarchical mixing method, that is a certain amount of drugs into a small amount of feed mixed, then mixed with 10 times the amount of feed, and so on until mixed into the entire feed. Be careful not to add the tablets directly to the pellets, otherwise the drug will deposit on the bottom of the tank (bucket) causing uneven mixing. Improper mixing can cause unfavorable intake of drugs by livestock and poultry. The lack of drug dose can not reach the effect of drugs. The excessive amount of drugs will lead to poisoning of livestock and poultry. Never add the drug to the feed at one time.
Pay attention to control the feeding position and feeding time according to need, provide sufficient feeding position and feeding time for the livestock and poultry, ensure that every head (only) livestock and poultry can feed the scheduled feed at the same time. Enter a predetermined number of drugs. Including the appropriate restrictions on feeding before feeding (pay attention to not stop the water), appropriate adjustment of the feeding position of the weak livestock and appropriate extension of the intake time and so on.
Pay attention to the incompatibility of additives and drugs in feeds. If sulfa drugs are used for a long time, vitamin B1 and vitamin K should be supplemented; when using aminopropriod, the amount of vitamin B1 should be reduced. In addition, when chlortetracycline or oxytetracycline is added to the feed, these antibiotics bind to metal ions in the feed, especially calcium ions, and cannot be absorbed by the intestine. In this case, 13 grams of sulfuric acid can be added per kilogram of feed. Copper binds the calcium ions in the feed with sulfate to insoluble calcium sulfate.
Pay attention to the incompatibility of drugs, to avoid antagonistic effects such as tiamulin and salinomycin, narasin, etc. Antagonism; norfloxacin (norfloxacin) can not be combined with rifampicin, furandante, Rifampin can antagonize the effect of norfloxacin, furandandine can counteract the antibacterial effect of norfloxacin in the urinary tract; tannic acid protein should not be combined with trypsin, pepsin, lactase, because of the combination of these proteins and tannic acid Loss of activity, citrate can make ferrous sulfate, aminopyrine, digitalis drug precipitation, and impede absorption, affect the efficacy; ferrous sulfate and other iron and tetracycline drugs can form complexes, interfere with each other's absorption.
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