DEAFNESS
A study by George M. Strain, Ph.D evaluating 5333 Dalmatians, showed that 70.1% are bilaterally hearing dogs, 21.9% are unilaterally deaf, and 8.0% are bilaterally deaf. Breeders reduce deafness in their litters by only breeding Bilaterally hearing dogs(can hear in both ears) and avoiding dogs and lineage with blue eyes. But deafness is still a possibility for every dalmatian puppy born. For this reason all responsible breeders should (and all prospective buyers should demand) their puppies are BAER tested by a veterinary professional prior to be placed in homes. Researchers at the University of Sydney are working with Dalmatian breeders to try and establish the genetic basis for hearing loss in Dalmatians. |
B = Bilaterally hearing (can hear in 2 ears)
U= Unilateral hearing (can hear in 1 ear) Hearing Deaf= Bilaterally Deaf (can hear in neither ear) |
WHAT IS BAER?
BAER stands for Brainstem Auditory Evoked Response. BAER testing can be used to evaluate the hearing of any dog (or cat), young or old that is suspected of being deaf in one or both ears. It is a test that determines whether cochlear function (inner ear) and the “wiring” to hear, is intact. The volume of the sound in the test can be varied but this test does not assess degree of any partial hearing loss. BAER testing requires ear plugs to be worn and 3 fine electrodes to be inserted under the skin. A mild sedative is usually given prior to testing so the foam earplugs don’t irritate puppy’s ears. There are different 'types' of testing. - BAER Vs BAERcom BAERCOM is a portable, stand-alone, 9V-battery-powered BAER hearing evaluation device for veterinary research and testing - Animals may be sedated or lightly anaethetised or not at all. |
STONE FORMING
Dalmatians carry a genetic mutation (SLC2A9), which prevents urine production going through the same metabolism as in other dogs. In dalmatians this process stops a step earlier, instead of harmless Allantoin being the final product which is easily excreted Dalmatians stop a step earlier as uric acid. Uric acid is not very soluble, and there is a risk that it can deposit in the bladder, and sometimes the kidney. Initially, the deposits resemble fine sand, but can subsequently progress to coarser grit and eventually to a stone. The presence of uric acid crystals, whether large or small, can cause irritation to the bladder and urinary tract, giving rise to infection. Urinary stones, which pass into the urinary tract, can cause blockage, which is very serious and requires immediate veterinary attention. Only a minor proportion or dalmatians do develop stone problems but preventative actions like following a low purine diet, hydration and free access to toiletting should be followed. Dogs appear to be at higher risk than bitches to urinary stones, and neutered animals seem more affected than their entire counterparts, This is believed to reflect the anatomical differences in their urinary tracts. |
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