While some horses are difficult to bridle because they're getting used to a new bit or a new way of handling, resistance to being bridled and a head tilt may be indicative the horse has an issue with the ear, mouth or skull, reports The Horse.
A true head tilt means that the horse's poll does not line up with the muzzle. A simple test is to place the muzzle on a midline and then look to see if the horse's head is tilted to one side. An even more definitive test of head tilt is to blindfold the horse and place his muzzle on the midline. Blindfolding the horse will exacerbate the tilt if one is present as the horse cannot compensate with his eyesight. A head tilt while blindfolded is indicative of an inner ear or vestibular nerve issue.
Having a veterinarian examine the ear canal as well as a full dental exam, including the temporomandibular joints, is necessary. A true head tilt may require additional diagnostics, including radiographs and possibly a spinal tap to determine if the horse had a neurologic disorder like EPM.
Read more at The Horse.
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