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Different bedding and stable dust

Straw bales

Peter Green MRCVS

2 July, 2009

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Most materials used for bedding produce a stable dust that is an irritant to horses' airways.

You only need to be mucking out and turning over a stable bed, with the sun streaming in through the door, to see the amazing amount of miniscule particles filling the air.

The perceived wisdom is that paper and shavings beds are better for horses with allergic airway disease, but there has been little objective assessment on the subject.

Vets in Germany recently took five different commercially-produced horse bedding products and analysed them.

They tested wheat straw, softwood shavings, hemp/flax fibre, straw pellets and shredded paper.

The results surprised them; the hemp/flax bed, which was specifically marketed for horses with irritable airways, produced the most particles.

Next was the wood shavings sample.

Paper and pelleted straw produced the least particles and wheat straw was somewhere in between.

The vets then studied horses in real bedding situations. They used straw, wood shavings and straw pellets.

Straw pellets performed the best and straw was the worst, even though in the lab, shavings had performed worse than the straw.

The vets believed that the difference in air quality between straw and shavings was a reflection of the fact that the straw bed was mucked out and replenished every day, while the shavings were just skipped out.

Further complications were discovered because the straw yielded more moulds than other beds.

For more of the latest veterinary research and developments, see the current issue of Horse & Hound (2 July, '09)

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