Causes and prevention of diarrhea in laying hens

A laying hen refers to a chicken raised to lay eggs. Eggs are the main source of income for raising laying hens. Unlike broiler chickens, the main task of raising laying hens is to improve egg quality and maintain or increase egg production, not to improve chicken quality. Layer diarrhea has brought a huge economic impact on layer breeding, so the reasons for layer diarrhea and how to treat it, let's take a look at it.

Diarrhea is a clinical symptom of the change of digestive function of the machine (chicken). Inflammation of the intestinal mucosa and poor feed, especially the indigestible crude fiber, fermentation spoilage products, bacteria and their toxins, histamine, serotonin and other mechanical and chemical stimulation, cause the secretory mechanism of intestinal mucosa to be enhanced, intestinal fluid secreted in large quantities, water and mucus in the intestinal cavity increased, forming thin or watery intestinal contents at the same time. Intestinal peristalsis is enhanced due to mechanical and chemical stimulation. Intestinal contents in the intestine by speeding up, the residence time is too short, can not be fully digested and absorbed, diarrhea occurs. Diarrhea in some cases can discharge harmful substances in the digestive tract, has a certain defensive effect, but diarrhea for a long time, resulting in a large loss of water and electrolytes, can cause dehydration and acidosis. The cause and mechanism of diarrhea are complex and multifaceted. With the difference of cause mechanism and course of disease, the symptoms, pathological changes and diagnosis and treatment measures are also different. Only with correct diagnosis and scientific and reasonable treatment can satisfactory results be achieved.

Layer diarrhea, in addition to disease factors, there are the following factors, and the symptoms and degrees of diarrhea are not the same.

First, the urinary system of the chicken is composed of the kidney and the ureter, which is directly connected with the rectum and opens in the cloaca, and the excess water in the chicken body is excreted together with the feces, so it is not surprising that the feces of laying hens are sparse compared with other poultry feces.

Second, when the external temperature is high due to climatic reasons, drinking water cooling is the main means for laying hens to maintain constant body temperature, but due to its physiological factors, most of the drinking water can only be discharged from the cloaca after blood circulation, resulting in thin feces.

Third, the feed factor some chicken farmers in order to improve the palatability of feed, enhance the appetite of chickens and supplement the salt in the body, often increase the salt content in the diet of laying hens, and sometimes the salt content of the feed itself is higher. the sharp increase in the amount of drinking water after eating will lead to thin feces. In addition, the high content of calcium hydrogen phosphate in feed and magnesium in stone powder will also lead to thin feces, which rarely occurs before the layer is changed, and most of them occur after the change.

The prevention and control measures are as follows:

1. Oral rehydration salts. Mix the oral rehydration salt into a solution according to the instructions and allow the chicken to drink. This is effective for replenishing the water lost by diarrhea in chickens, improving the resistance of the body and reducing mortality.

two。 Add an appropriate amount of carbon powder to the feed. Such as charcoal powder, steamed bread coke, can effectively relieve diarrhea symptoms. It is appropriate to add 2% to 3% of the diet.

3. Feed the right amount of garlic.

4. Choose appropriate antimicrobials. The above measures have a good therapeutic effect on diarrhea symptoms of unexplained laying hens and those whose effect of antibiotics is not obvious.