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Laminitis is an inflammation of laminae that affects the feet of ungulates and is found mostly in horses and cattle. Clinical signs include foot tenderness progressing to inability to walk, increased digital pulses, and increased temperature in the hooves.
Several plants, including nightshade, become more toxic as they wilt and die, posing a danger to horses eating dried hay or plant matter blown into their pastures. [ 3 ] The risk of animals becoming ill during the fall is increased, as many plants slow their growth in preparation for winter, and equines begin to browse on the remaining plants.
A normal horse with have a cranial phase and a caudal phase of equal length: the horse will bring the leg as far forward as it does backward. In a lame horse, the cranial phase will be shorter when compared to the caudal phase, so it appears to spend more time with the leg backward than it does forward.
Although support-limb laminitis is a risk for any horse that is not weight-bearing lame, occurring in roughly 16% of cases, it is uncommon in foals and yearlings. [135] It usually occurs weeks to months after the initial cause of lameness, [ 136 ] and greatly increases the likelihood of euthanasia of the patient. [ 137 ]
The prognosis for a horse with navicular syndrome is guarded. Many times the horse does not return to its former level of competition. Others are retired. Eventually all horses with the syndrome will need to lessen the strenuousness of their work, but with proper management, a horse with navicular syndrome can remain useful for some time.
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.
A horse with PPID, which has an overactive pars intermedia not regulated by glucocorticoid levels, does not suppress ACTH production and, therefore, cortisol levels remain high. False negatives can occur in early disease. [1] Additionally, dexamethasone administration may increase the risk of laminitis in horses already prone to the disease. [8]
There are several pictures supposedly showing laminitis, but I think what would most help would be a comparison photo of a healthy horse foot. That way the differences will stand out, as opposed to having to guess what isn't where it is supposed to be. 128.157.160.13 ( talk ) 14:43, 25 May 2011 (UTC) [ reply ]