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Large Animals
Pendular nystagmus is seen in various breeds of dairy cattle but appears to have little clinical significance.
Congenital deafness has been reported in horses.
Small Animals
Congenital deafness is primarily associated with Dalmatians but has also been recorded in a number of breeds including Australian Blue Heelers and Shepherds, English Setters, Boston Terriers, and Old English Sheepdogs. It is linked to blue eye color in white cats. The brain stem auditory evoked response is a useful diagnostic test primarily used to identify carriers in a litter of affected animals. (Also see Deafness.)
Last full review/revision July 2011 by Rebecca A. Packer, MS, DVM, DACVIM (Neurology)
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