When large groups of drugs are often used when a drug is required in a chicken farm, large groups of drugs are usually administered by adding the desired drug to drinking water or feeding. We often hear that adding a few percent or a few ppm of a drug to feed or drinking water for the treatment of a disease, but it is often impossible to guarantee in actual production that the chicken does get an effective dose of the drug, which fails to achieve the desired effect.
Chickens, like other animals, should be dosed based on their individual body weight. Although it is very simple to add calculated drugs to feed and drinking water, it is sometimes difficult to meet the individual needs of chickens. This is because the concentration of these drugs is calculated based on the normal amount of water or feed intake of chickens, so this The breeding chicken is not very suitable for the period of restriction. For example, when a commercial broiler is free to feed at the age of 5 weeks, it can consume more than 120 grams of feed per day, while the feed intake of broilers of the same age is only half. In addition, if the 3.5 kg weight of the breeding hen after the peak period of the egg production is more than 160 grams, it is only half of the free feed intake. In this way, these breeders will not be able to get their expected drug dose.
When an outbreak occurs, the affected chickens stop eating or feed intake. In this way, if drugs are added to the feed, those chickens that are in urgent need of drug treatment will not get or get a little less than an effective dose of drugs. At the same time, the feeding time of breeding chickens is usually about half an hour in the breeding period, and only 1-4 hours in the laying period, so those chickens with weak and poor appetite cannot receive effective treatment.
Some people overcome this problem by using double-dosing methods. However, this will result in overfeeding of healthy chickens and severe drug poisoning when the drugs used are more toxic (eg, furazolidone and sulfonamides).
Therefore, the use of drinking water for breeding breeders is better than mixed feeding. First, drinking water can be restricted without any restrictions or without affecting the amount of feed intake. Second, most diseased chickens also drink water without appetite, although drinking water may be less. However, some medicines must be mixed and used in feeding, such as anticoccidial drugs or drugs for treating chronic chicken cholera.
If it is necessary to administer the drug in the diet, the following factors must be considered when calculating the dose: an effective dose per kilogram of body weight, such as oxytetracycline 55 mg/kg body weight. The uniform weight of the chicken. For example, the uniform weight of the breeding hens at the age of 19 weeks is 2 kg. Each chicken feeds on a daily basis. Such as: 95 grams per day, such oxytetracycline in the amount of feed should be added: 55mg 2kg/0.095kg=1158mg/kg or 1158g/ton feed
The result calculated from the above example is that 1158 grams of terramycin pure powder should be added per ton of feed. Because the commercial drugs in the market usually contain only a certain percentage of pure drugs, they should be calculated correctly and adjusted accordingly. At the same time, calcium intake may reduce the absorption and utilization of oxytetracycline. During the treatment period, 13 kg of sodium sulfate per ton of feed may be added to avoid the effect of calcium removal (disabled during the laying period). In this way, a well-calculated medication regimen will ensure that the birds take the correct dose of the drug, and the treatment results are much better than using the same regimen for all chickens under different conditions.
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