Four causes of feed are easy to cause diarrhea in chickens
1. The content of salt is too high. In order to enhance appetite and prevent the occurrence of feather pecking and anal pecking, too much salt was added to the chicken feed, which made the chickens drink too much water and often had strong diarrhea. In addition, the excessive amount of fish meal or the added fish meal itself contains too much salt, which can easily lead to excessive salt content in the feed and cause diarrhea in laying hens.
2. The addition of stone powder is too high. Excessive or rapid addition of stone powder in the diet will lead to excessive blood calcium in laying hens, increase the burden on the kidneys, cause kidney swelling, and eventually cause diarrhea. In order to meet the needs of laying eggs, the amount of stone powder in the diet of laying hens must increase step by step with the increase of laying rate.
3. The level of crude protein is too high. In order to make chickens lay more eggs, some breeders often increase the proportion of soybean meal in the diet. The content of soybean meal is too high, the body absorption is not complete, so as to stimulate the intestinal tract, accelerate metabolism, resulting in chicken feces yellowing and thinning, feed conversion rate reduced. In general, the crude protein requirement of laying hens is about 16%. If the protein content is too high or the egg energy ratio is not balanced, it is easy to weaken the liver and kidney function of laying hens, resulting in a large amount of urate deposition and even gout.
4. Mildew of raw materials. Raw materials in feed, such as corn and peanut meal, become moldy, and their toxins will stimulate and destroy the intestinal mucosa of laying hens, increase the permeability of intestinal mucosa and cause diarrhea in laying hens.
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Pathogen and Epidemiology of Infectious vesicular Disease in Pigs
The disease is an acute infectious disease caused by porcine vesicular virus. Usually only pigs can be infected naturally, cattle, sheep and other animals are not easy to be infected, so it can be distinguished from foot-and-mouth disease. The disease is characterized by blisters in the skin and oral mucosa of the hairless part of the pig body. There are blisters and rotten spots around the crown of the hoof, between the toes, the skin of the heel and around the nipple of the sow. The disease is widely distributed and spreads rapidly. The disease was first found in Italy in 1966. After it became popular in the United States, Austria, Hungary and other eastern and western European countries in the 1970s, it was also popular in Japan.
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Clinical symptoms, Prevention and treatment of Porcine Encephalitis B
Porcine Japanese encephalitis (je) is a zoonotic disease caused by Japanese encephalitis virus (je). The disease was first found in Japan, so it is also known as Japanese B encephalitis. The pathogenic Japanese encephalitis virus is not resistant to the outside world and can be inactivated after 30 minutes at 56 ℃ or 2 minutes at 100 ℃, but it can survive for several years under the condition of minus 70 ℃. When the pH value is less than 7 or more than 10:00, the activity decreases rapidly. Disinfectants such as 2% caustic soda solution and 3% Lysol water
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