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Pay attention to lameness and reduce the elimination rate of dairy cows.
Release time:
2020-12-07
Harm of hoof disease: hoof is the supporting organ of dairy cows, if improper feeding and management, hoof is prone to pathological changes, hoof deformation and symptoms of hoof disease, resulting in difficulty in walking, lameness, loss of appetite, decreased lactation, serious cases are eliminated.
If the cow's lameness is not detected and treated in time, it will not only affect the health and comfort of the cow, but also affect the reproductive performance of the cow. A newly pregnant cow is worth about $200 to $600, while a cow that misses the best breeding period will lose $2 to $6 per day for each additional day of empty pregnancy. It can be seen that maintaining good reproductive performance of cows will directly affect the profitability of the cattle farm.
The study showed that lameness had the greatest negative effect on the number of days of empty pregnancy in dairy cows compared with retained placenta, mastitis and ovarian cysts. Whether tethered or grazing, the lameness of cows can increase the number of empty pregnancy days by about 3 cycles.
Cow lameness also affects its elimination rate. Data from the National Animal Health Monitoring Service Dairy Industry Report show that 16% of the elimination rate is due to cow lameness, while 26% of the elimination rate is due to reproductive disorders. Thus, a large proportion of cows eliminated due to reproductive disorders, whether they are breeding failures or reduced conception rates, are due to lameness.
hoof diseaseThe hazards: Hoof is the supporting organ of dairy cows. If the feeding and management are improper, the hoof is prone to pathological changes, hoof deformation and symptoms of hoof disease, resulting in difficulty in walking, lameness, loss of appetite, decrease of lactation, and serious cases will be eliminated.
Main IngredientsBenzalkonium chloride, glutaraldehyde, zinc sulfate
Method of use:
1-Prevention:2% concentration twice a week
Treatment: 5% concentration twice a week, it is recommended to spray directly on the affected area.
2. Cattle with severe hoof disease can take effect after one week of continuous use. Clean up the affected part, spray stock solution, scab in 3-4 days, and most cattle recover in 7 days (hoof bath solution must be kept clean at the same time)
3、Sinoe HoofCan be attached to the cow hoof disease for a long time, can be more effective in removing germs.Replace the solution 500 the first time.
Effects of Lameness on the Behavior of Dairy Cows
Many people believe that lameness will lead to reduced estrus performance in cows, but this is not the case. Studies have shown that lameness changes mainly in cow estrus performance and has little effect on estrus. In fact, climbing behavior and the incidence of estrus were similar in moderately limping cattle (motor score 3) and non-limping cattle. However, severe lame cattle compared with non-lame cattle, moderate lame cattle, the degree of oestrus decreased.
Zinpro's nutrition experts told the Dairy Reproduction Council annual meeting in JeffDeFrain that moderate lameness cows "do not receive special attention" and that there is no significant change in behavior related to oestrus. It is difficult to select moderately lame cattle from the herd by visual observation. These cows may appear visually similar to estrus, but the reality is a different story. Dairy cows with moderate lameness had 2.8 times more lactation days to receive breeding for the first time than those with exercise scores of 1 or 2. These cows not only had difficulty in conceiving, but also had a 8.4 times higher elimination rate than other cows.
Studies have shown that lameness cattle can continue to ovulate and have mature follicles, but the time of estrus has changed. Due to the mismatching of estrus performance and follicular development cycle, the mating opportunity or the mating time point of synchronous estrus plan is missed. In fact, lame cows ovulate first and then show estrus.
The low reproductive level of chronic claudication cows is controlled by the pulse frequency of progesterone. DeFrain pointed out: "The follicles are good, but their function is destroyed. These cows have low progesterone levels and sometimes low estrogen levels."
Traditional experience suggests that heat stress and lameness can have a significant impact on reproductive performance in dairy cows. However, studies have shown that there are physiological differences between the two conditions. Heat stress prevents the maturation of the follicles, but the follicles of lame cows can continue to grow and mature. It is assumed that the physiological basis is the same, which is not conducive to the production efficiency and production life of limp cattle.
Early treatment is key
Studies have shown that lameness cattle that last 5 weeks have a 25% cure rate and 40% elimination rate. However, a one-week limp cow would have a 91% cure rate and an 18% elimination rate. In order to maintain the various properties of the herd, it is essential to identify and treat lameness cattle as early as possible. Ranch staff should be trained in watching cattle bow, nodding, and changing the gait of limping cattle. Even though the cow has a movement score of 3, it will keep up with other cows in the herd when going to the milking parlor.
Within 30 days, a cow can change from moderate lameness (exercise score of 3 points) to severe lameness (exercise score of 4 points). Often when a ranch employee notices a limp cow, it has arched its back and the exercise score becomes 4. When the exercise score is 4, the chance of recovery of these limping cows is almost zero. However, if a limping cow can be found when its exercise score is 3, and treated within 30 days, its exercise score can be restored to 2 points, or even 1 point, and it can still maintain productivity in the herd.
Translated from Cattle-breeder Alliance
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