Two simple tests can help confirm suspected deafness.
For many years, anecdotal incidences of deafness in some blue-eyed Paint Horses
were reported, but until recently, published reports of deafness in Paint Horses
was lacking in the veterinary literature. Initially, University of
California–Davis researcher K. Gary Magdesian, D.V.M., DACVIM, DACVECC, DACVCP,
presented a short abstract at the American College of Veterinary Internal
Medicine Forum in 1998, but veterinary textbooks still failed to include any
mention of deafness in horses. In February 2006, an article was published in The
Canadian Veterinary Journal confirming the diagnosis of deafness in a Paint
Horse by a team of Auburn University College of Veterinary Medicine clinicians.