The Breed History
This breed is similar in type to the deerhound but is much larger;
in fact it is the tallest breed of dog in the world. The first written
records of this breed date to the year 391 in a document authored
by a Roman, though evidence exists that they were in Ireland before
that. At one point the breed almost became extinct but in 1862,
remaining stock was gathered and restoration of the breed began.
Infusion of Scottish Deerhound, Great Dane, and Borzoi bloodlines
helped to widen the gene pool. The first breed standard was drawn
up in 1885.
Breeding for Function
The Irish wolfhound was used for the hunt in pursuit of wolves
and elk and was renowned for courage and an excellent gentle
temperament. Bred for sight hunting and chase, these dogs were
renowned athletes. They were not considered suitable for guarding,
watchdog or other such work. The breed has become a valuable
country companion, and also excels at coursing and obedience
competitions. They are not built for draft.
Physical Characteristics
Height at Withers: female 30" (76 cm), male 32" (81 cm).
Weight: females 105 lb minimum (48 kg), males 120 lb minimum
(54.5 kg). Some males have reached 180 lb and exceed 35"in height.
Coat: They possess a rough-coated hard, weather resistant haircoat
with wire over eyes and under the mandible. A soft dense undercoat
is present. Approved colors include red, brindle, black, fawn, gray, or
white.
Longevity: 6-8 years
Points of Conformation: The Irish Wolfhound is often described as
a heavy-set greyhound type. They possess moderate bone weight.
They posses high head carriage, the head is long and the muzzle
has a moderate point. Eyes and nose are dark, and the small ears
are carried back. The neck is long, muscular and arched without a
dewlap. The thorax is very deep and is wider at the front aspect. The
ribs are well sprung. The long back transitions smoothly into arched
loins and the tail is long and thickly coated, with a curved tip. The
strong boned limbs are straight, feet are large and round, and the
toes well knuckled. The gait is smooth, easy and elastic. Hips are
broad, and the abdomen well tucked up.
Recognized Behavior Issues and Traits
Reported breed characteristics include: Requires a rural setting,
preferably a property with a securely fenced perimeter so that
the dog can freely exercise. They are very large in stature and
may not fit in well in small rooms and homes. These dogs do
settle down indoors, and are intelligent. They require close human
companionship. Sensitive, they require a soft touch, and they
require mental stimulation and physical activity; bored ones will
become destructive. Early socialization and obedience training is
important.
Though they do very well around children, puppies can easily weigh
75 lb and so care must be taken that rambunctious puppies do not
inadvertently injure small children. Minimal grooming is needed
(biweekly will suffice). They shed year-round, but tend not to blow
the coat. Many chase cats and small dogs so ideally, they should
be raised with them (even so, quick movements can trigger a chase
reflex). Provide soft bedding or calluses and hygromas may form.
Beard may need cleaning after a meal. Good trainability. Generally
get along with other dogs.
Normal Physiologic Variations
Sight hounds have lower normal ranges for T4 and T3
concentrations compared to other breeds.
Echocardiography: The predictive value of body weight for
echocardiographic measurements was clinically not relevant. Sex
had no influence on echocardiographic values.
Echocardiographic Normal Values:
Parameter Mean Range Mean В±2SD
LVIDs (mm) - 35.4 /25.4-41.5 /29.8-41
LVIDd (mm) - 53.2/ 42.7-65.5 /45.2-61.2
FS (%) - 34.0/ 25-48 /25-43
FWs (mm) - 14.9/ 9.7-21.3/ 10.6-19.2
FWd (mm) - 9.8 /6.6-13.8/ 6.6-13.0
IVSs (mm) - 13.7/ 8.1-19.0/ 8.9-18.5
IVSd (mm) - 9.3/ 5.2-13.5/ 5.7-12.9
LA (mm), M-mode - 32.9 /25.4-40.9/ 26.1-39.7
AO (mm), M-mode - 33.1/ 23.1-39.7/ 27.7-38.7
EPSS (mm) - 6.8/ 4.0-11.4/ 3.6-10.0
LA (mm), 2D - 47.3/ 36.5-56.8/ 38.7-55.9
RA (mm), 2D - 40.4/ 30.9-54.6/ 25.4-55.4
RVIDd (mm), 2D - 29.1/ 17.9-37.6/ 21.4-36.8
ESVI (ml/m2) - 29.0/ 15.3-40.6 /17.2-40.8
Heart rate (bpm) - 121/ 74-166/ 74-168
Age (yrs) - 3.4/ 1-8.5
Body weight (kg) - 65.0 /48-93
N - 262
LVIDs, left ventricular end-systolic dimension; LVIDd, left ventricular
end-diastolic dimension; FS, fractional shortening; FWs and FWd,
left ventricular free wall thickness at end-systole and end-diastole;
IVSs and IVSd, interventricular septum thickness at end-systole
and end-diastole; LA, left atrial end-systolic dimension; AO, aortic
root diameter at end-diastole; EPSS, E-point to septal separation;
RA, right atrial end-systolic dimension; 2D, two-dimensional
echocardiographic measurement; RVIDd, end-diastolic right
ventricular internal dimension; ESVI, end-systolic volume index.
Blood Pressure: Irish wolfhounds have lower arterial blood pressure
than other sight hounds. Arterial blood pressure measurements
were obtained from 158 healthy Irish wolfhounds using the
oscillometric technique. Mean systolic pressure was 116.0 mm Hg.
Mean diastolic pressure was 69.2 mm Hg, and the average mean
arterial pressure was 87.8 mm Hg. Blood pressure measurements
were higher in older wolfhounds than in young dogs. There was no
difference between systolic and mean arterial blood pressures in
lateral recumbency compared to the standing position. However,
diastolic pressure was slightly lower when standing. Calm dogs had
lower pressure than anxious wolfhounds. There was a significant
interaction between the effects of age, gender, and mood on
systolic, diastolic, and mean arterial blood pressure values.
A study in the UK reports 40.3% of Irish Wolfhound litters are
delivered via Cesarean section.
Drug Sensitivities
Anesthesia: Sight hounds require particular attention during
anesthesia. Their lean body conformation with high surface-area-
to-volume ratio predisposes them to hypothermia during
anesthesia. Impaired biotransformation of drugs by the liver
results in prolonged recovery from barbiturate and thiobarbiturate
intravenous anesthetics. Propofol, and ketamine/diazepam
combination are recommended induction agents.
Inherited Diseases
Dilated Cardiomyopathy (DCM): Complexly inherited form of
dilated cardiomyopathy with a 3:2 male/ female ratio. In one
survey of 500 dogs, 24.2% had DCM, with 88% of those having an
accompanying Atrial Fibrillation (AF). Another study reported a
frequency of 12.1%. Right-sided congestive heart failure develops
with pleural effusion and pulmonary edema. The mean age at
which AF was first detected was 3.8 years in males and 4.9 years in
females, and the mean time from the first detection of AF to CHF
was 6.4 years in males and 2 years in females. Dorn reports a 3.43x
odds ratio for cardiac disease versus other breeds.
Elbow Dysplasia: Polygenically inherited trait causing elbow
arthritis. OFA reports 12.1% affected. Reported 93.4x odds ratio for
the fragmented coronoid process form of elbow dysplasia versus
other breeds.
Hip Dysplasia: Polygenically inherited trait causing degenerative
joint disease and hip arthritis. OFA reports 5.3% affected.
Patella Luxation: Polygenically inherited laxity of patellar
ligaments, causing luxation, lameness, and later degenerative
joint disease. Treat surgically if causing clinical signs. Too few Irish
Wolfhounds have been screened by OFA to determine an accurate
frequency.
Disease Predispositions
Epilepsy (Inherited Seizures): Partial or generalized seizures. Treat
with anticonvulsant medications. Reported at a frequency of 18.3% in
one study, with a heritability of 0.87. Suggested autosomal recessive
inheritance with incomplete penetrance and a male prevalence.
Iris Cysts: Fluid filled sacs arising from the posterior surface of
the iris. They may remain affixed to the iris, or break free into the
anterior chamber. Identified in 7.92% of Irish Wolfhounds CERF
examined by veterinary ophthalmologists between 2000-2005.
Cataracts: Anterior, posterior, intermediate and punctate cataracts
occur in the breed. Age of onset 1-2 years with rapid progression,
or 5-7 years with slow progression. Identified in 6.19% of Irish
Wolfhounds CERF examined by veterinary ophthalmologists
between 2000-2005. CERF does not recommend breeding any Irish
Wolfhound with a cataract.
Distichiasis: Abnormally placed eyelashes that irritate the cornea
and conjunctiva. Can cause secondary corneal ulceration. Identified
in 5.20% of Irish Wolfhounds CERF examined by veterinary
ophthalmologists between 2000-2005.
Osteosarcoma (Bone Cancer): Irish Wolfhounds are a breed with
a predisposition to develop malignant osteosarcoma. It usually
occurs in the extremities. Dorn reports a 27.50x odds ratio versus
other breeds. Unknown mode of inheritance. One study showed an
increased risk in castrated male Irish Wolfhounds.
Optic Nerve Hypoplasia/Micropapilla: Congenital defect of optic
nerve development affecting vision, or a small optic disc. Identified
in 1.24% of Irish Wolfhounds CERF examined by veterinary
ophthalmologists between 2000-2005.
Gastric Dilatation-Volvulus (Bloat, GDV): Polygenically inherited,
life-threatening twisting of the stomach within the abdomen.
Requires immediate veterinary treatment. Dorn reports a 5.52x odds
ratio versus other breeds.
Corneal Dystrophy: Epithelial/stromal form of corneal opacities on
the surface of the cornea. Unknown mode of inheritance. Identified
in 2.48% of Irish Wolfhounds CERF-examined by veterinary
ophthalmologists between 2000-2005.
Hypothyroidism: Inherited autoimmune thyroiditis. 2.3% positive
for thyroid auto-antibodies based on testing at Michigan State
University. (Ave. for all breeds is 7.5%).
Retinal Dysplasia: Retinal folds, geographic, and generalized retinal
dysplasia with detachment are recognized in the breed. Reported
in 2.23% of Irish Wolfhounds CERF examined by veterinary
ophthalmologists between 2000-2005.
Porto-Systemic Shunt (PSS, Liver Shunt): Congenital abnormality
of abnormal blood vessels connecting the systemic and portal blood
flow. Causes stunting, abnormal behavior and possible seizures.
Tobias reports a 9.9 odds ratio versus other breeds. Post-prandial bile acids and blood ammonia tests are used for diagnosis, as
fasting samples are often normal. Diagnosed in 2.1% of Irish
Wolfhounds in the Netherlands. Appears to be complexly inherited
without sex influence.
Everted Cartilage of the Third Eyelid: A scroll-like curling of
the cartilage of the third eyelid, usually everting the margin. Can
be unilateral or bilateral, and cause ocular irritation. Identified
in 1.24% of Irish Wolfhounds CERF-examined by veterinary
ophthalmologists between 2000-2005.
Osteochondritis Dissecans (OCD): Polygenically inherited cartilage
defect of the humeral head or stifle. Causes joint pain and
lameness in young growing dogs. Mild cases can resolve with rest,
while more severe cases require surgery. There is a 2.24:1 male to
female ratio. 75% of all cases are unilateral. Dorn reports a 3.65x
odds ratio versus other breeds. Another study reports a 523.5x odds
ratio for stifle OCD, and a 47.1x odds ratio for shoulder OCD versus
other breeds. Shoulder OCD is reported at a frequency of 1.2% in
the Irish Wolfhound.
Progressive Retinal Atrophy (PRA): Inherited degeneration of
the retinal leading to blindness. Onset is early with blindness
developing in the young adult (2-3 years of age). Presumed
autosomal recessive mode of inheritance. CERF does not
recommend breeding any Irish Wolfhound with PRA.
Rhinitis/Bronchopneumonia Syndrome: Affected Irish
Wolfhounds present beginning at less than 1 year of age with
transient to persistent mucoid or mucopurulent rhinorrhea, cough,
and dyspnea. Affected dogs responded to antibiotics, but were
chronically recurring. In one study, ciliary function tests were
normal, but low circulating IgA levels were seen. Abnormal ciliary
function is still being investigated. Occurs worldwide. Unknown
mode of inheritance.
Megaesophagus is also reported on the IWCA website.
Cervical Vertebral Instability, Entropion, Hypertrophic
Osteodystrophy, and von Willebrand's Disease are reported.
Isolated Case Studies
Fibrocartilaginous Embolism: Diagnosed in eight Irish Wolfhounds
between eight and 13 weeks of age. Affected dogs have an acute
onset of abnormal locomotion. Diagnosis by histopathologic
identification of focal myelomalacia and Alcian blue-positive-nucleus-
pulposus material in the spinal cord vasculature. Dogs with mild
signs can improve and survive.
Juvenile Nephropathy: Case report of one Irish Wolfhound
presenting with severe polyuria and polydipsia, and progressing to
chronic renal failure. Histopathology included immature glomeruli
and/or tubules, and persistent mesenchyme.
Spinal Nephroblastoma: A 1-year-old Irish wolfhound was
presented with a history of slowly progressive left pelvic limb
paresis. An intradural, extramedullary mass at the caudal aspect of
T13 was diagnosed histologically as an extrarenal nephroblastoma.
Genetic Tests
Tests of Genotype: None.
Tests of Phenotype: CHIC Certification: Elbow and hip
radiographs, CERF eye examination, and cardiac evaluation.
Optional testing includes serum bile acid test. (See CHIC website;
caninehealthinfo.org).
Recommend thyroid profile including autoantibodies and patella
evaluation.
Miscellaneous
- Breed name synonyms: Greyhound of Ireland, Wolfdog of
Ireland, Irish dogs, Big dogs of Ireland, Great Hound of Ireland (all
historical), wolfhound, IW, Cu Faoil.
- Registries: AKC, UKC, CKC, KCGB (Kennel Club of Great Britain),
ANKC (Australian National Kennel Club), NKC (National Kennel Club).
- AKC rank (year 2008): 81 (863 dogs registered)
- Internet resources: Irish Wolfhound Club of America:
iwclubofamerica.org
Irish Wolfhound Club of Canada:
irishwolfhoundclubofcanada.ca
Irish Wolfhound Club (UK): irishwolfhoundclub.org.uk
The Irish Wolfhound Foundation, Inc.: iwfoundation.org
Irish Wolfhound Health Group: iwhealthgroup.co.uk
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