1- Failure to take into account biosecurity in all its aspects.
2- Providing adulterated and contaminated feed, diets prepared using an unscientific program, and scattering feed.
3- Placing a number of chickens crowded together per square meter exceeding the maximum percentage.
4- Providing long and fluctuating hours of darkness for the herd.
5- Dirt and malfunctions occurring in devices and tools.
6- Fluctuation of temperature and humidity in all areas of poultry farming.
7- Combining more than one type of production in one field, such as a hall for raising broilers and a hall for raising layers.
8- Negligence in getting rid of waste and vaccination waste because they are among the most important causes of disease outbreaks.
9- Fluctuation of electrical energy and hours of light and darkness.
10- Delayed marketing of the herd, poor quality of the product and marketing method