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Home NEWS Science News Science

Compost bedding good for cow claw health

Bioengineer by Bioengineer
November 4, 2016
in Science
Reading Time: 4 mins read
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Credit: Johann Burgstaller/Vetmeduni Vienna

The comfort and wellbeing of the animals is an important consideration when dairy cows are kept in barns. The freedom afforded by loose housing systems such as freestall cubicle barns promotes the natural behaviour and health of the animals. The widespread switch from tie-stall housing to loose housing has seen a change in the type of claw lesions, but the frequency of claw disorders has been on the rise.

Wood chips and sawdust instead of straw

International studies have identified the compost bedded barn as the beneficial for claw health. Compost bedded barns use wood chips or sawdust as bedding instead of straw. The wood residue binds the excrement and daily aerating incorporates the manure and starts the composting process. This makes an even concrete floor important in the roaming area. Slatted flooring, in which manure and urine fall into a separate area beneath the floor, should only be installed in the feed alley. Fresh bedding should also be added daily following aeration.

A team of researchers from Vetmeduni Vienna, led by Johann Burgstaller from the Clinical Unit of Ruminant Medicine, has for the first time compared the frequency of claw disorders and lameness in compost bedded barns and the more common freestall cubicle barns in Austria. The researchers investigated the frequency and severity of claw lesions in five compost bedded barns and five freestall barns. "Lesions of low severity were categorized as grade 1, severe lesions as grade 3. The results for the individual lesions were weighted and subsequently added together to calculate an index value for the claw health per barn," Burgstaller explains. "A high value indicates poor claw health; a low value indicates good claw health. This value, however, is also influenced by factors such as frequency of care, feeding and genetics."

Compost bedding reduces the number of cases of claw lesions

The compost bedded barns exhibited about one half the number claw disorders, such as foot rot or white line disease, as the freestall barns. Both the frequency and severity were lower. Lesions of grades 2 and 3 were seen only rarely. The compost bedding thus has a proven beneficial effect on claw health. Lameness, on the other hand, occurred at nearly the same frequency in both barn types. At about 18 percent, however, the average of the freestall and compost bedded barns was below the international and previous Austrian level of 25 percent.

Humid bedding contributes to claw disorders

Even if modern barn types give dairy cows more freedom to roam, the animals must still stand in manure and urine for longer periods of time. The excrement increases the floor humidity and has negative consequences for claw health. The result are claw lesions, such as foot rot or white line disease. "Floor humidity softens the skin between the claws, which makes it susceptible to bacterial infections. The reduced horn quality can lead to lesions and, in serious cases, sole haemorrhages," Burgstaller explains.

White line disease occurs when floor humidity attacks the sensitive junction between the sole and the wall of the claw. Sudden or rotating movements create pressure on the affected junction and the sole slowly separates from the wall. This type of claw disorder is one of the main causes of lameness.

Compost bedded barns allow more social interaction

Compost bedded barns that are aerated and refilled daily can counter claw damage over the long term. This requires more work and effort on the part of the farmers. But after one year of composting, they can use the bedding as fertilizer. According to Burgstaller, the situation for dairy cows living in freestall barns can also be improved with more frequent re-bedding to keep the area dry.

The main difference between the compost bedded barn and the freestall barn is that the former has just one large area for roaming. "There are no cubicles. This is more in keeping with the pronounced social behaviour of cattle," Burgstaller explains. A dairy herd is organized hierarchically. If a cow is forced to leave its place for an animal of a higher rank, it can get up quickly and move out of the way without any obstacles. The stable and nonslip surface also allows weaker animals to get up or lie down safely, which is an enormous advantage in cases of milk fever.

###

Service: The article "Claw health and prevalence of lameness in cows from compost bedded and cubicle freestall dairy barns in Austria" by J. Burgstaller, J. Raith, S. Kuchling, V. Mandl, A. Hund and J. Kofler was published in The Veterinary Journal. http://www.sciencedirect.com/science/article/pii/S1090023316301034

About the University of Veterinary Medicine, Vienna

The University of Veterinary Medicine, Vienna in Austria is one of the leading academic and research institutions in the field of Veterinary Sciences in Europe. About 1,300 employees and 2,300 students work on the campus in the north of Vienna which also houses five university clinics and various research sites. Outside of Vienna the university operates Teaching and Research Farms. http://www.vetmeduni.ac.at

Scientific Contact:
Johann Burgstaller
Clinical Unit of Ruminant Medicine
University of Veterinary Medicine Vienna (Vetmeduni Vienna)
T +43 1 25077-5203
[email protected]

Released by:
Georg Mair
Science Communication / Corporate Communications
University of Veterinary Medicine Vienna (Vetmeduni Vienna)
T +43 1 25077-1165
[email protected]

Media Contact

Johann Burgstaller
[email protected]
43-125-077-5203

http://www.vetmeduni.ac.at

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