Jack Russell disorders, Jack Russell Eye Diseases, Jack Russell
Neurological diseases, Conquest Terriers, Buffalo, New York USA
Serving Brantford, Hamilton, London, Milton, Toronto, Niagara, St.
Catharines, Fort Erie, Buffalo New York.
Disorders in Jack Russells: A
- Cataract: Lens opacity which obscures vision
and may cause blindness.
Congenital Cataract and Microphthalmia:
Cataracts associated with a small eye globe.
Distichiasis: Abnormal location of eyelashes on
the margin of the eyelid, causing irritation.
Glaucoma: Increased pressure in the globe which
can damage the eye causing blindness.
Glaucoma (pigmentary): Glaucoma in which a dark
pigment is also present in the globe and which apparently
blocks the drainage angle.
Lens Luxation: Dislocation of the lens from its
normal site behind the cornea (partial or complete).
Persistent Pupillary membranes: Failure of
blood vessels in the anterior chamber to regress normally;
there may be impaired vision or blindness.
Progressive Retinal Atrophy: Degeneration of
the retinal vision cells which progresses to blindness.
Trichiasis: Abnormal placement of the eyelashes
on the eyelid.
Cerebellar Ataxia: Degeneration of the cortex
of the cerebellum leading to a staggering gait; it may or
may not progress.
Congenital Myasthenia Gravis: Severe muscle
weakness may cause megaesophagus, fatigue and collapse due
to a failure of neuromuscular transmission of nerve
Bilateral Deafness: Inability to hear; i.e.,
completely deaf, both ears affected.
Unilateral Deafness: Partial deafness; one ear
Epilepsy: Seizures commonly called fits; they
recur generally closer together.
Hydrocephalus: Accumulation of fluid in the
brain causing severe pressure and degeneration of the
Myelodysplasia: Lack of development of the
brain causing incoordination.
Scotty Cramp: Muscle cramps triggered by
excitement or exercise; you may see a rabbit hopping gait.
Trembling: Excessive shaking or trembling,
particularly of the rear limbs.
Wobbler Syndrome: Abnormality of the neck
vertebrae causing rear leg ataxia which may progress to
b. Ceroid-Lipofuscinosis (ATP subunit C storage):
Causes night blindness, confusion, unpredictable
aggressiveness, and ataxia late in the course of the
c. Ceroid-Lipofuscinosis: Causes visual
impairment, confusion, erratic temperaments, and apparent
loss of memory for previously learned tasks.
d. Congenital Vestibular Disease: Causes loss of
balance/incoordination, dog appears to try to keep from
Achondroplasia (Appendicular): Lack of normal
development of the skeleton, particularly of the
appendages (limbs); dwarfism.
Cleft Lip/Cleft Palate: A fissure in the roof
of the mouth and upper lip, may be present together or
Hemivertebra: Abnormal formation of the body of
the vertebra, can cause posterior ataxia and paralysis. It
causes the twisted tail in the screw tailed breeds.
Legg-Perthes: Aseptic necrosis of the head and
neck of the femur, causes rear leg lameness.
Overshot: Upper jaw extends beyond the lower
Patellar Luxation: Poor development of
structures holding patella (knee cap) in place, usually
medial (inward) in small breeds.
Premature Closure of the Ulna: Ulna stops
growing sooner than radius, causes wrists to turn in and
front feet to turn out.
Radial Agenesis: Radius stops growing sooner
than the ulna causing bowed front legs.
Undershot: Lower jaw extends beyond the upper
Laryngeal Hypoplasia: Failure of development of
the larynx (voice box) causing breathing difficulties.
Tracheal Collapse: Improper formation of
cartilaginous rings of the trachea causing mild to severe
Tracheal Hypoplasia: A small trachea due to
improper development causes mild to severe breathing
Oligodontia: Absence of most if not all teeth.
Pyloric Stenosis: Abnormally small opening
between the stomach and the duodenum, prevents food from
passing and causes sharp projectile vomiting.
Aggressiveness (Excessive): Excessively
assertive or forceful with other dogs or people, may
attack or bite without reasonable provocation.
Von Willebrand's Disease: Reduced factor VIII
in the blood resulting in a prolonged bleeding time; may
be mild, moderate, or severe and can cause death.
Cardiomyopathy: Abnormality of heart muscle may
cause edema of the lung, weakness at exercise and sudden
Patent Ductus Arteriosus: Failure of the fetal
vessel between the aorta and pulmonary artery to close
around the time of birth, causes heart murmurs, exercise
weakness, and may cause death.
Inguinal Hernia: Outpouching of skin in the
area of the inguinal ring which may contain viscera; a
scrotal hernia is a type of inguinal hernia.
Umbilical Hernia: Outpouching of skin over
belly button; may contain abdominal viscera, and regress
Diabetes Mellitus: Excessive sugar in the blood
and urine due to a lack of insulin.
Growth Hormone Deficiency: Lack of production
of or inability to use growth hormone causes dwarfism.
Hypothyroidism: Destruction of the thyroid
gland due to an attack from the animal's own immune system
causes rough, scaly skin; hair loss; weight gain.
Cryptorchidism: Absence of testicles due to
retention in the abdomen or inguinal region, may be one or
both sided or may slide in and out of the scrotum.
Hermaphrodite: Presence of gonadal tissue for
both sexes due to the presence of a full compliment of
both male and female chromosomes.
Short or "High" Toes. This is a developmental
condition where the outside toes, usually on one or both
front feet, do not grow to normal length, giving the
appearance of being a "short" or "high" toe that does not
touch the ground when full the terrier is full grown.
Absence of premolars (one or more). Terrier is
missing one or more pre-molars; does not have full
Conquest Jack Russell Terriers
For Work, Show or Just
N. Gaye Redpath-Schaeper & Tom Schaeper
|All Contents Copyright Conquest Terriers 2005