
Hairy heel wart, also known as strawberry foot disease, is a digital dermatitis which affects the heel tissues above and proximal to the meeting of the hoof claws (interdigital space). It’s a rather insidious virus, specifically a bacterium in the spirochete family called treponema. It is highly contagious and can spread rapidly to susceptible animals such as dairy cattle around calving, first-calf replacement heifers and malnourished cattle. Interestingly, some infected cattle do not show clinical lesions, yet are contagious carriers often to break with disease later on when they become stressed. Wet conditions and poor manure sanitation play a significant role in its spread throughout the dairy barn.
Symptoms
Close inspection of the photo of this cow’s hoof illustrates the early stages of hairy heel wart, which is literarily a raw hole, prone to bleeding when broken open (strawberry warts). As these growths mature, they become larger (2 cm) lesions with hair-like projections giving hairy heel wart its name.
Needless to say, hairy heel warts are an extremely painful condition for dairy cattle, which affects hind hooves in 85 per cent in confirmed cases. Dairy producers may first observe that afflicted cattle tend to walk on their toes, because the developing warts may also cause abnormal heel overgrowth.
Such dairy cows also do not perform well. For example, a lame dairy cow with hairy heel warts in early lactation often has a reduction in milk production by 20 to 50 per cent. It’s likely a matter that a lame lactating cow doesn’t want to go up to the feed bunk. As a result, it reduces the dry matter intake (DMI) that provides dietary energy and other essential nutrients. In some hairy wart cases, such a reduction in DMI may cause a severe negative energy balance; a rapid and abnormal breakdown of bodyfat to ultimately end in detrimental metabolic ketosis.
Fortunately, over the years I have seen that many hairy wart problems can be successfully treated. Medicated soluble powder recommended by the herd’s veterinarian is often applied directly to the lesion and then the hoof is wrapped with an elastic bandage. In a few days, these once limping animals seem to be walking and up to the feed bunk as if nothing ever happened.
Prevention
As a dairy nutritionist, I believe in preventative medicine against hairy heel warts, which in this case means making the dairy cows’ skin around the hooves healthier and the hoof horn harder by nutritional means. A few years ago, I instructed a dairy producer to add four grams per head per day of zinc methionine to his lactation dairy premix, which in turn was added to his daily milking TMR. After seven months of zinc addition, a successful reduction in general lameness including hairy heel warts was observed. Even the hoof trimmer made the comment — the condition of the skin around the hooves and general hardness of the hooves in the cow herd had improved.
Aside from this nutritional testimony, I am also an advocate of having cows biweekly walk through a clean acidified copper or acidified copper-zinc sulphate foot bath. This routine can be tailor-made to one’s situation, which should help disinfect cow herd hooves, which in turn should prevent the spread of hairy warts.
Proper foot care should be parallel with good sanitary barn conditions. I know of one producer who runs alley manure scrapers in his free-stall barn more frequent than most people normally practice. Another producer, whom operates a robot-barn, washes the concrete pad and metal grate under each milking station. In both cases, the lactating cows’ feet are notably cleaner and hairy heel warts are not much of a problem compared to my other barn visits.
Whether it comes to turning on the scrapers or washing down the barn each day or even treating each case as it pops up, dairy cows need our help when it comes to controlling hairy heel warts. Healthy cows should easily stand on their feet and go up to the bunk at their leisure. When they are able to eat their fill and without the pain of hairy heel warts, they are able to contribute to optimum milk performance.
Source: Grainews

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Over the past few years, there have been dramatic improvements in dairy reproductive performance.
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One third of the cows is not making it in their barns. Why? Because of diseases, and one in particular. Subclinical rumen acidosis is barely visible, but will weaken you cows, leading to other diseases. In the end, this is cutting cow lives short. If we want to do something about this, we need to broaden our knowledge of feed. There’s plenty of information about feed quality available, but more knowledge of housing and management with regard to feeding is much needed.
Shocking numbers and there’s plenty to say about each disease individually. But let’s look at one disease in particular: rumen acidosis. This disease is hard to recognize for farmers, but will seriously weaken the cow. It starts with nausea and by the time you catch it (or not), the other trouble has already started: mastitis, lameness, low fertility rates and so on. This is what in the end is keeping cows from happily and healthy making it to five lactations.
So if you can hardly catch it in time, it is even more crucial to prevent it. For prevention farmers need a good understanding of how the rumen functions and an excellent feeding program. A major issue is feed quality and luckily, most farmers have a good feed advisor for this. What the feed advisor often doesn’t tell the farmer is how management and housing effect feed intake. Without broadening knowledge about feeding to these areas as well, rumen acidosis just will keep happening.
In summary, rumen acidosis is a very serious disease that has enormous effects on both the cow’s as the farmer’s life. Good farmers will actively search for new insights and improvement opportunities in the housing and management department. Good advisors, that are keen on giving quality advice and creating a sustainable relationship with their clients by constantly being of added value, face the challenge to give advice on a broader scope and involve all factors needed for a good feeding program. This will not only benefit cows and farmers, but also the farm advisor. Together, we can do a better job.
About Feeding Signals
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