The only known genetic disorder found in the breed is congenital myotonia, a hereditary muscle disorder, which was identified in 2009 in a New Forest pony foal by researchers in the Netherlands, the first time the condition had been identified in equines.
The only known genetic disorder found in the breed is congenital myotonia. This was what a hereditary muscle disorder had been identified in equines. A hereditary muscle disorder was the first time the condition. Congenital myotonia was identified in 2009 in a New Forest pony foal by researchers in the Netherlands. Congenital myotonia was a hereditary muscle disorder.