Hessex chicken
The commercial substitute chickens with brown shell eggs imported from Uribrid in the Netherlands can distinguish between male and female according to their color: hens color-90% are all brown-red, 8% are brown with white stripes on the back, and 2% are white but red or brown in the head. Rooster color-all: yellow accounted for 90%, white all over, but brown stripes on the back accounted for 8%. The whole body is white, but there are four narrow brown lines on the back, some of which are clear and some are not clear. Production performance: the laying rate reached 50% at the age of 158 days, the average laying rate at the age of 20-78 weeks was 76%, the annual egg production was 308, and the hens laid 299 eggs a year, with an average constant weight of 63.2 grams, a feed-to-egg ratio of 2.39, and a weight of 2.25 kg at the end of the laying period.
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Porcine rotavirus infection
Epidemic characteristics sick people, animals and carriers of recessive infection are all sources of infection. The virus exists in the intestinal tract, excretes to the outside world with feces, and infects susceptible people and animals through the digestive tract. The disease spreads rapidly and mostly occurs in the cold season. Piglets and piglets are common. Adult pigs are generally occult infection. Pathological changes of diseased piglets are depressed spirit, loss of appetite, vomiting, diarrhea, feces are yellow or gray, watery or paste. The lesions were mainly limited to the digestive tract (especially jejunum and ileum), the intestinal tube became thinner and the small intestinal villi shortened.
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Control measures and precautions of chicken lice
Prevention and control measures 1, body surface lice eradication. 1. Spray lice. At noon in spring, autumn and winter, nontoxic deltamethrin (mixed with 5 ml nontoxic deltamethrin and 2.5 liters of water) or Houning insecticide aerosol, nontoxic multi-merex, deltamethrin (medecine), etc., can be selected to prepare diluent according to product instructions and sprayed (reverse feather spray of chicken). 2. Sand bath to kill lice. the adult chicken can select sulfur sand (10 part of yellow sand and 0.5 - 1 part of sulfur powder are mix evenly) or nontoxic deloucide, ivermectin and abamectin
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