Causes of limb and foot disease
1. breed factors
The domestic and foreign research shows that the disease mainly occurred in the lean product lines and height of breeding, such as Yorkshire, Landrace, Duroc and Hampshire etc.. Pigs with slender hooves and feet are most susceptible to the disease, which is characterized by rapid growth, high lean meat, and a thinner and thinner breed. In China, local breeds and their hybrids with exotic breeds are rarely attacked by pigs. Foreign countries have found that the incidence of growth is slow and the incidence of low back fat is very low. So during the breeding of seed farms, try to hoof thick, mainly backfat preferred breeding.
2. nutritional factors
Gilts in feed demand for calcium, phosphorus is relatively large, if the proportion is improper, easy to cause the hoof bottom crack, selenium deficiency can cause foot deformation, hair removal, arthritis, chronic fluorosis and manganese deficiency, can cause abnormal hoof deformation, and when a Mn deficient transverse, zinc deficiency is a hoof the bottom crack or lateral fissure, lacking of vitamin D affects bone growth and the occurrence of rickets, limb hoof and arthritis is not swelling, the hoof of pig of uneven stress, resulting in Clefthoof, especially in intensive closed feeding, lack of exercise and sunlight are more susceptible to the disease. Reserve pigs in one hundred pounds later, if you have been feeding the fertilizer, there is insufficient nutritional development of the bones of the body, in the breeding may be overwhelming boar phenomenon. At the same time, there is a high demand for biotin for the reserve pig, and in the later stage of the reserve pig breeding, special attention should be paid to adding organisms to meet the nutritional needs.
3. climate factors
In the "twenty-four" article on solar term pig I have mentioned, the main gas in cold winter, the wind cold dampness, invade the skin, into the meridians, will cause limb hoof pain, resulting in lameness, so winter is more common limb hoof disease appeared. The cold contractio, wet evil into the body will be contractio, spring warms up, wet evil will break out of this is Yang, the original "foot-and-mouth disease" pathological process. At the same time, the phenomenon of Yang deficiency, Qi is not solid, Wei Yang cannot warm limb, also can cause the pathological status of cold and dampness, it will directly cause clinical manifestations of paralysis.
4. loop factors
In split hoofed pigs, hind limb hooves are larger than forelimb hooves. This is related to the smoothness of the ring surface, and the smoothness of the ring surface is moderate. It can be seen that there are dense small grains of sand, the ring surface is too smooth, the sand can not be seen, the ring surface is too rough, and the larger sand grains are easy to see. Among the three types of sows, the incidence of limb weakness syndrome is significantly different, the incidence of the former is low, and the incidence of the latter two types is higher. In the circle of surface structure, intensive farrowing pigs hoof injury (38%) was significantly higher than that of cement ground scattered pigs (7.14%), cement ground feeding pig's trotters bottom (35.75%) was significantly higher than that of hyperplasia of slatted floor pigs (27.91%).
The new cement ring surface is alkaline or corrosive due to lack of cleaning and disinfection, resulting in damage to the hoof and hoof of the pig and splitting the hoof. Is not in the minority, so it is best to use the new pigsty disinfection epidemic PA, neutralizing alkaline floor, reduce its corrosion.
Prevention measures of foot and foot disease
The breeding of anti limb hoof disease
Through the selection of the limb hoof degree, the structure of the limbs and the whole body are improved, and the possibility of resisting the disease is increased. Too large for the body, limb hoof is too thin, too much weight per unit area of the supporting bone, easy to cause the hoof injury of individual, should be resolutely eliminated, no seed.
The improvement of feed nutrition
Feed the full price balanced feed to ensure the supply of minerals, vitamins, and especially biotin and linoleic acid. To ensure adequate supply of calcium, phosphorus and appropriate proportion, and to ensure the supply of zinc, copper, selenium, manganese and other trace elements.
Adding biotin improves the firmness, compression and compressive strength of the hoof shell, improves the condition of the skin and coat, and reduces the fragmentation of the shoe shell and the symptoms of shoe pad damage. It is suggested that more than 90 to 0.25-0.3ppm should be added to the pig diet.
Naturally dried corn is rich in linoleic acid and is not damaged. Both puffed soybean and soybean oil contain a large amount of linoleic acid, which has a certain effect on the absorption of biotin. So prone to pig feed Clefthoof in preparation, recommend the use of natural dry corn (without drying or selection of corn grain reserves), soybean oil or add a certain proportion, in order to improve the breeding of biotin utilization.
The improvement of surface texture and management circle
The cement floor shall be of proper smoothness and inclination (but must be less than 3 degrees) with no sharp ground and no water. The intensive pig farm ground the best use of epoxy resin slatted floor, new cement ground must be flush with the pigsty repeatedly dried after disease PA solution in pigs, so as to avoid the corrosion caused by alkaline pig's trotters clefthoof. Conditional pig farms should ensure that pigs have outdoor sports for a certain period of time and accept sunlight, which is beneficial to the synthesis of vitamin D. At the same time, the design direction of the reserve pig house is best to calculate the longest sunshine time according to latitude and longitude, so that it can improve the oestrus breeding time of the herd.
The prevention of secondary infection
In the stadium entrance set foot bath pool into the 0.1%-0.2% formalin solution for the prevention and treatment of infected pigs, has occurred or just Clefthoof pigs after disinfection and symptomatic treatment, because the hoof sole wear, secondary infection, limb hoof swelling, available to Compound Amidopyrine Injection, Benzylpenicillin Sodium for Injection, ichthammol and other drugs for symptomatic treatment.
Treatment of limb and foot disease
1. Add the medicine in the feed: Jin Wei 100