In the actual breeding process often occurs in laying hens, what causes the hens to recoil? In the main, there are genetics, management, nutrition, environment, disease and other factors.
genetic factors
Different breeds of laying hens, under the same conditions, the probability of occurrence of prolapse of the anus is different, generally speaking, the incidence of prolapse of anal hens of small-sized hens is higher than that of medium sized hens, and the occurrence of white shell hens is higher than that of brown hens. Large and high laying hens are more prone than lower hens.
Management factors
Before the laying hens start production, if the lighting time is extended in advance, it will lead to premature sexual maturation, tubal, pelvis, etc. have not yet fully developed, they will lay eggs in advance. Chickens opened in advance due to strong hormone secretion, resulting in an increase in ovulation, the emergence of large eggs and double yellow eggs increased the probability of individual oversized eggs through the fallopian tube difficulties, resulting in mechanical prolapse of the anus. If the management does not pay attention to weight control of back-up chickens, it is also prone to rectal prolapse. If you do not limit feeding during the rearing period, layer chickens will appear overweight, overweight, and evenness of the chicken population, leading to rectal prolapse.
Nutritional factors
Overweight laying hens are prone to occur, and overweight, one of the main reasons is that the nutrient levels of the hens in the late gestation period are too high, which can lead to the rapid deposition of fat in the hens's jaws and obesity. Insufficient vitamin A and vitamin E in layer diets; fed feeds have expired, mildewed, easy to make keratinized epithelium of tubal and cloaca epithelium, or even inflammation in the fallopian tubes, resulting in tubal stenosis, and then lead to rectal prolapse.
envirnmental factor
After the hens produce eggs, if they encounter a significant change in environmental conditions, resulting in stress, it will affect the normal recovery of cloacal hens, the occurrence of prolapse. The environmental conditions are mainly the rearing density of laying hens, the abnormal noise of chicken houses, ventilation of chicken houses, environmental sanitation conditions, and the content of ammonia gas and hydrogen sulfide gas in the house.
Disease factors
Salmonella, E. coli, chronic fowl cholera and other digestive tract diseases will cause dehydration of the chicken for a long time, making the hen's fallopian tube mucosa unable to secrete enough mucus, reducing the lubrication of the fallopian tube mucosa, causing the fallopian tube to dry, resulting in rectal prolapse. In addition, when artificial insemination is performed, due to improper operation force or improper insertion depth of the insemination gun, it is easy to damage the fallopian tube mucosa, causing the hen's fallopian tube mucosa to become purple and mucus increase, the difficulty of egg discharge, and excessive expulsion resulting in rectal prolapse.
pvc gloves,pvc vinyl gloves,vinyl gloves
HOLIK ASIA GROUP CO.LTD , https://www.holikasia.com