/
RSS Feed
The entire surface of the bird’s digestive system is covered with a mucous layer, which is essentially a defensive barrier on the surface of the bird’s digestive system. This layer is composed of mucin, the thickness of which varies in different parts of the digestive system. The mucous layer also serves as a substrate for the growth of beneficial microorganisms in the digestive system. Conditions such as nutrition and environment affect the quality of this tissue. Environmental stressors such as vaccination, disease, dietary changes, high environmental temperature, etc., increase the level of corticosteroid hormone.