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Horses distributing these symptoms, it can be thought that is could be colic, laminitis, and/or tetanus. [ 4 ] [ 1 ] If an observer is unfamiliar with ER, initial symptoms may appear to be tiredness or perhaps lameness , but the condition is far more complex.
This sometimes leads to static laminitis, particularly if the animal is confined in a stall. [10] A notable example is the 2006 Kentucky Derby winner Barbaro. [11] Transport laminitis sometimes occurs in horses confined in a trailer or other transportation for long periods of time. Historically, the most extreme instances were of horses shipped ...
Horses with a high weight-to-foot-size ratio may have an increased chance of exhibiting symptoms of navicular syndrome, since the relative load on the foot increases. This might explain why the syndrome is seen more frequently in Thoroughbreds , American Quarter Horses , and Warmbloods as opposed to ponies and Arabians .
Hoof or horseshoe wear can indicate breakover and if the horse is dragging its toes. Change in shape of the hoof wall is also common in horses with laminitis. "Founder rings," or thickened concentric rings in the hoof wall, indicate a past episode of laminitis. Concavity of the dorsal (front) surface of the hoof can indicate chronic laminitis.
Plants can cause reactions ranging from laminitis (found in horses bedded on shavings from black walnut trees), anemia, kidney disease and kidney failure (from eating the wilted leaves of red maples), to cyanide poisoning (from the ingestion of plant matter from members of the genus Prunus) and other symptoms.
Horses are best managed by only allowing short grazing periods—less than 1 hour since they can rapidly ingest grass, [18] or confining them to a limited turn-out area or by use of a grazing muzzle. Horses with severe IR, that have recurrent laminitis, are not recommended to return to pasture. Hay low in NSC is provided in place of pasture.
Infected horses founder usually within three days of the initial symptoms, thought to be secondary to endotoxemia. [1] Death may occur and is usually due to severe laminitis leading to founder. [1] Horses may not always display any other symptoms beyond a fever. [1]
Horses heterozygous for the Ile118Lys mutation on the equine EDNRB gene—carriers of lethal white syndrome—usually exhibit a white-spotting pattern called "frame", or "frame overo". [5] [7] [9] [13] Frame is characterized by jagged, sharply defined, horizontally oriented white patches that run along the horse's neck, shoulder, flank, and ...