Dog Training Hand Signals
Strain says he has identified 89 dog breeds with incidences of congenital deafness, some much higher than others. Dalmatians seem to be the most at risk, he says, with 30% of puppies born deaf in one or both ears.
Other breeds with higher incidents of deafness include the bull terrier, English setters, Australian cattle dog, the Catahoula Leopard dog, whippets, and Parson Russell terrier (formerly known as Jack Russell terrier.)
Strain says although researchers still aren't sure what causes congenital deafness, they do know it's most common in dogs with white or nearly white heads.
"The lack of pigment on the head causes the pigment cells in the inner ear to fail to develop, or they may be lacking entirely," Strain says. "The lack of pigment cells causes the death of the nerve cells that need to develop for hearing to occur."