1 Summer mosquitoes are prone to hundred crown disease in many seasons, hundred crown disease, also known as resident leukocyte protozoa disease, belongs to the blood parasitic disease, mainly parasitic in poultry blood, the disease death of chicken mouth blood chicken crown white
2 Coccidiosis, coccidiosis is a nutritional metabolic disease, coccidiosis long-term parasitism in the intestine to absorb intestinal nutrition, resulting in malnutrition of the body, mainly manifested in chicken crown whitish, feces with blood
3 mycotoxins Long-term mycotoxins cause liver lesions in chickens, immunosuppressive body resistance is poor and easy to get sick, and chicken crowns are whitish
4 liver disease Liver mainly detoxification effect to relieve a variety of toxins (including drug toxins, mycotoxins, toxins in feed) inclusion body hepatitis, hepatitis E, long-term medication, yellow liver and other liver diseases will become liver whitish, malnutrition