Hip dysplasia is caused by a laxity
of the muscles, connective tissue, and ligaments that would normally
support the joint. As this happens, the articular surfaces of the two
bones lose contact with each other. This separation of the two bones
within the joint is called a subluxation, and this causes a drastic
change in the size and shape of the articular surfaces. Most dysplastic
dogs are born with normal hips but due to their genetic make-up (and
possibly other factors) the soft tissues that surround the joint
develop abnormally causing the subluxation. It is this subluxation and
the remodeling of the hip that leads to the symptoms we associate with
this disease. Hip dysplasia may or may not be bilateral; affecting both
the right and/or left hip.
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Hip dysplasia is marked with the letters A to E. A and B are healthy
hips, the other letters describe variable level of dysplasia. Hip
dysplasia is inheritable, therefore it is recommended to breed only
dogs up to C-hips (dogs with C-hips should only be bred with dogs with
A-hips).
The elbow dysplasia is usually tested together with hips and marked
with numbers 0 to 5. Number 0 marks healthy elbows
Dysplasia tests are recommended for Dalmatians.
BAER
The white color of Dalmatian's coat or the lack of pigment there has
been linked to the deafness in the breed. Unfortunately the deafness is
a great problem in the breed and it is also an inheritable problem,
therefore it is suggested that already the puppies should be tested for
deafness. Deaf puppies are usually euthanized. The hearing test known
as the brainstem auditory evoked response (BAER) or brainstem auditory
evoked potential (BAEP) detects electrical activity in the cochlea and
auditory pathways in the brain in much the same way that an antenna
detects radio or TV signals or an EKG detects electrical activity of
the heart. The response waveform consists of a series of peaks. Because
the response amplitude is so small it is necessary to average the
responses to multiple stimuli (clicks) to unmask them from the other
unrelated electrical activity that is also present on the scalp (EEG,
muscle activity, etc).
The response is collected with a special computer through extremely
small electrodes placed under the skin of the scalp: one in front of
each ear, one at the top of the head, and one between and behind the
eyes. It is rare for a dog to show any evidence of pain from the
placement of the electrodes - if anything the dog objects to the gentle
restraint and the irritation of wires hanging in front of its face. The
stimulus click produced by the computer is directed into the ear with a
foam insert earphone. Each ear is tested individually, and the test
usually is complete in 10-15 minutes. A printout of the test results,
showing the actual recorded waveform, is provided at the end of the
procedure. It is common that the dog will be seducted for the procedure.
It is not recommended to use deaf or unilaterally hearing Dalmatians in
breeding.
Hearing test is recommended for Dalmatians.
ARDS
Adult Respiratory Distress Syndrom (ARDS) appeared as a symptom of a
genetic defect among Dalmatians in Finland (and once in Denmark) in the
years 1987-1997. In Finland 6 litters were affected, the last in 1997,
with a total of 17 dogs thought to be suffering from the disease. All
the 17 dogs died or were euthanized. Early on, indications for an
inherited disease were found by dr. A.-K. Järvinen and coworkers
in Finland and studies of the pedigrees of the affected litters soon
pointed towards the bitch O´Soul Escada as the probable source of
a genetic defect. The damage to her genes is thought to have been
caused by a point mutation. Several of the descendants from Escada were
extensively used in breeding and the results (concerning ARDS) appeared
to be in accordance with an autosomal recessive mechanism of
inheritance. Although there has been no test matings to ultimately
prove this mechanism, the national breed clubs in Finland, Norway and
Denmark and the health committee of the Danish Kennel Club have
accepted the recessive inheritance hypothesis based on strong
circumstantial evidence.
The carriers of this disease are the dogs whose parents both have the
"bad gene". The carriers and their descendants to variable extent of
generations can not be used in breeding.
The table containing data about the known carriers is in the ECDC
webpage.
ALLERGIES
Dalmatian is one of the breeds known to be very prone to allergies. One
of the reason is surely the short and white coat of Dalmatian that lets
you see even the minor processes and problems affecting the skin and
coat. There are many reasons for allergies- contact allergy, allergy
distributed by air, food allergy etc. Very common is flea allergy that
can become repetative. Therefore it is recommended to use anti-flea
treatment during the warm season from May to October. If you suspect
food allergy it is wise to consult with your veterinarian. The most
common way to find out to which food your dog is allergic to is
elimination diet. There is no possibilities at the moment to do
specific allergy tests for dogs in Estonia.
URINARY
TRACT PROBLEMS
Dalmatian is the only breed with the unique urine forming process.
Therefore the purine level in their food is essential for their health.
Purines are foremost the part of animal proteins and they become uric
acid in the body that in turn can cause the formation of uric bladder
stones in Dalmatians. Removing them needs a specific surgery. The
amount of purins in certain foods can be found below in the article
"Healthy Dalmatian Diet" Giving your Dalmatian food and treats high in
purines can cause the formation of bladder infections, bladder crystals
and finally bladder stones. It is interesting to know that in majority
Dalmatians are forming urate stones that are not visual in common urine
tests or common x-rays. It takes contrast x-rays, ultrasound or lab
analysis to detect them. When you suspect urinary tract problems in
your Dalmatian it is not hard to take the urine test and take it to the
vet for analysis or if possible to do regular tests at home. The urine
pH of the healthy Dalmatian is 7.
MENTALITY
Mentality is very important in Dalmatian. A Dalmatian can not be
neither shy nor agressive. In Nordic and other countries there are
special tests to test the psychics of the dog (i.e. what the dog really
is not what he can learn). The discussions over whether to include the
successful passing of this test to the breeding recommendations of
Dalmatians are still going on. Until the decision it is still a very
interesting and useful experience for all Dalmatian owners. You still
have to consider that the test is very hard on the psychics of the dog
and therefore if failed you can take it again only one time. You need
+70 points to pass this test.