Przegląd kalectwo

Where are we today?

The incidence of lameness worldwide has risen over the years to approximately 25 percent of all dairy cows being treated every year, and around 15 percent of cows being culled for lameness-related problems. With almost 128 million dairy cows in the world (United States Department of Agriculture, 2008), that’s a staggering number of sick or problematic animals – which is only set to rise as we demand increasingly more from our production systems.

A common problem in recording the incidence of lameness is that many farmers do not “zobaczyć” or recognise the level of lameness they have on their farm until they are informed of it. A pro­ducer who sees the same cows with the same problems every day may become desensitised or immune to them, and perhaps think that they are normal. Usually, jednak, the problem is realised after a new product or management regime is implemented, or a study trial started, and attention is focused on that particular area. This is then often wrongly perceived as the source of the problem as the incidence of lameness on the farm was not acknowledged beforehand.

A trial conducted in Kansas City, US in 2005 looked at many different aspects of management on 68 farms, in order to document what constitutes good and bad hoof management practices. Cows were scored for locomotion and hoof health, and the producers were asked several ques­tions. The trial produced many interesting results, but one of the most striking was that on average the farms had 28 percent lameness whereas the owners had estimated only six percent – pretty shocking!

graphSource Delaval – Kansas City

The clear message is to monitor your cows constantly, especially if you plan to introduce a new product or if your animals participate in a study. You should always be aware of the health status on your farm, but it is doubly important to record this before changing anything in your routine so that you can accurately assess if things improve or worsen.

Lameness, especially infectious lameness, most commonly occurs on the hind feet, with approximately 80 percent of cases being diagnosed here. Cows often stand with their front feet in the cubicles and their back feet in slurry, predisposing them to increased infection and disease transmission. Most traumatic lameness occurs on the outer or lateral claw of cows, due to weight bearing. If a problem occurs on the front feet it is most often the inner or medial claw of a heifer that is affected, for the same reason.

Informacje dostarczone przez DeLaval UK