First, look at the eggshell. If the duck has trachoma or rough, or even soft shell, indicating that the duck is incomplete nutrition, calcium deficiency or vitamin D, should be fed bone meal, shell powder or vitamin D.
Second, look at the production time. The normal egg production time is between 2 o'clock in the night and 6 o'clock in the morning. If you delay the laying time every day, you should supplement the concentrate.
Third, look at the egg production rate. In the early stage of egg production, the egg production rate of ducks keeps rising. If the egg production rate fluctuates or even declines, it is necessary to look for reasons from the aspects of feeding and management and whether or not there are diseases.
Bulk of varicella vaccine,semi-Finished Products.It has good safety with low ratio in adverse reaction. And it has been exported to Bangladesh.
In 2008, BCHT successfully launched its product Varicella Vaccine, Live in China. In the following years, BCHT continuously committed to improving the product and led in 2010 removal of gelatin from adjuvant and extended the vaccine shelf-life up to 36 months which is the longest one in the world in 2011. And it has the following qualities.
Rabies Vaccine,Freeze-Dried Rabies Vaccine,Mild Rabies Vaccine,Stable Rabies Vaccine For Human Use
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