Risk Factors
The main risk factor for grass sickness, as the name may suggest, is grass. The disease is almost always seen in grazing animals, although there are isolated reports of the condition occurring in stabled horses. Grass sickness is most frequently seen in young horses aged between two and seven, and is particularly prevalent during April, May and June, and later in the autumn, after a spurt of grass growth.
Research has identified a number of other risk factors which may increase the likelihood of a horse developing grass sickness including: soil disturbance, worming with Ivermectin based dewormers, movement to new pasture, stress, grazing on a field which has previously produced a case of grass sickness.
Read more about this topic: Grass Sickness
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