Tuesday, April 23, 2024

Tail scoring a herd doesn’t imply there is a problem

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It is important to track changes annually to identify how and why any new tail damage occurs, if it occurs at all. 
Tail scoring can provide farmers another monitoring tool for maintaining optimum herd health and should be performed by a trained vet or technician.
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This article first appeared in our sister publication, Dairy Farmer.

It is not uncommon for vets to tell us that some of their farmers are reluctant to have a tail score performed on their herd. It is a sensitive subject, probably driven by the number of prosecutions that have occurred in recent years. 

But scoring a herd doesn’t imply there is a problem, it is simply a monitoring tool, like herd testing or BVD bulk milk monitoring.

An annual tail score is carried out to monitor tail damage. It is important to track changes and identify how and why any new tail damage occurs, if it occurs at all. 

Tail damage is a little different to the other metrics we monitor with WelFarm, as most are directly linked to productivity, but tail damage is primarily an animal welfare issue. And with farming under such an intense magnifying glass, there are many reasons for having assurances in place to monitor welfare and understand what is happening with the herd.

To carry out a tail score, a trained vet or tech will visually inspect every tail, as well as touch them to assess any damage. They will make note of any abnormalities, classifying the damage as deviated, shortened or as a trauma or swelling. It is a quick job and for a rotary they are typically carried out during milking. For herringbones they may get you to run them in the AB race afterwards.

After the whole herd has been scored, they will collate the results and if you’re using WelFarm they will enter them into the portal where you can see the benchmarks, which compare your results to other farms in the region and across New Zealand.

The first time a herd is scored they are taking a baseline, creating the benchmark for the farm itself, and every score after that can be compared to that base. Generally, scoring will take place annually at a consistent time, for a good comparison and assessment of what might have changed.

If after a tail score you have any concerns about the results, your vet can help you put a plan in place to reduce any damage or injuries that may be occurring, whether they be from the infrastructure or any handling techniques. The type of abnormalities detected will provide clues as to what could be causing the problems.

While I was putting this info together, 60% of farms enrolled in WelFarm had had a tail score performed. And, consistent with research in this area, 20% of cows had some form of tail damage recorded. Of the abnormalities detected, 54% are due to deviations and 28% are due to shortenings, which will reduce over time as the older cows are culled from herds and younger cows no longer have their tails routinely shortened.

There is limited information on what causes deviations in tails, but it has been suggested that it may be caused by mechanical damage in the milking shed or collecting yard, or inappropriate handling. But without scoring your herd and investigating the results, it is hard to determine what could be causing problems on your farm.

By capturing information and having it available for future reference, you are able to monitor trends and progress. And if you are ever questioned you will have the evidence to show that you are aware and are working with the right people to improve the situation. 

Tail scoring is a valuable tool for dairy farmers to identify issues early, ensure animal welfare, and maintain productive herds. Tail damage is painful for cows and should be avoided at all costs. The tail tells a story –  what are the ones on your farm saying?

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