Congenital Conditions of breeds that come in the merle pattern. What do
you see in common? The Chihuahua is also listed, they do not have these
conditions.
Source http://www.petdoc.ws/BreedPre.htm
| Australian Shepherd Cataracts Cleft palate Collie eye anomaly Autosomal recessive Dwarfism Hereditary deafness Associated with merle and piebald genes Hip dysplasia Micropthalmia Small eyes Multiple ocular colobomas Nasal solar dermatitis Persistent pupillary membrane Progressive retinal atrophy Retinal detachment Retinal dysplasia Scleral ectasia Spina bifida Umbilical hernia |
Shetland Sheepdog Achondroplasia Bladder cancer Bilateral renal agenesis Cataract Autosomal recessive Central progressive retinal atrophy Mottling and increased reflectivity of area centralis Results in lack of central vision Affects dogs starting at 3-5 years of age Difficulty in seeing stationary objects Sight best in dim light Choroidal hypoplasia Collie eye anomaly Coloboma Corneal dystrophy Deafness Dermatomyositis Discoid lupus erythematosus Distichiasis Ectasia syndrome Recessive Excessive tortuosity of retinal vessels Choroio-retinal dysplasia Excavation of the optic disc Retinal detachment Intraocular hemorrhage Veriform streaks of the fundus in young dogs Ectopic cilia Epidermolysis bullosa Familial dermatitis Folliculitis, bacterial Hemophilia A, Factor VIII or AHF deficiency Heterochromia iridis "Walleye" Blue and white iris Hip dysplasia Hypothyroidism Idiopathic ulcerative dermatosis Muscular dystrophy Nasal solar dermatitis Hereditary susceptibility and lack of skin pigment predispose to the disease Patent ductus arteriosus Personal Pupillary membrane Systemic lupus erythematosus Ulcer conditions of apocrine glands Uveodermatological syndrome Von Willebrand's disease Yeast dermatitis |
| Collie Achondroplasia Autosomal recessive cystic neutropenia (gray Collie syndrome) Bladder cancer Bullous pemphigoid Choriodal hypoplasia Collie eye anomaly Coloboma Corneal dystrophy Deafness Demodicosis Dermatomyositis Discoid lupus erythematosus Distichiasis Dwarfism Entropion (related to enlarged orbit) Epilepsy EEG may detect at an early age. Hemophilia A, Factor VIII or AHF deficiency Hemorrhagic episodes Heterochromia iridis Whitish-blue iris Hidradinitis Hypoplasia of the optic nerve Idiopathic ulcerative dermatosis Inguinal hernia Microphthalmia (result of merle to merle mating) Small eyes Nasal furunculosis, bacterial Nasal solar dermatitis Hereditary susceptibility and lack of pigment predisposed to the disease. Optic nerve hypoplasia Patent ductus arteriosus Pemphigus erythematosus Progressive retinal atrophy Dilated pupils react sluggishly to stimuli Night blindness progressing to blindness Atrophy of retinal vessels and increased reflectivity of tapetum lucidum. Progressive retinal degeneration type I Progressive retinal degeneration type II (central retinal atrophy) Proliferative keratoconjunctivitis Pyotraumatic dermatitis Recessive ectasia (Collie eye anomaly) Excessive tortuosity of retinal vessels, dysplasia, excavation of the optic disc, retinal detachment, intraocular hemorrhage, and veriform streaks of the fundus in young dogs. Retinal dysplasia Systemic lupus erythematosus Umbilical hernia |
Australian Cattle Dog Congenital portosystemic encephalopathy Deafness Eczema Lysosomal storage disease Dachshund Acanthosis nigricans Achondroplasia of the limbs Atypical chronic superficial keratitis (atypical pannus) Chronic superficial keratitis (miniatures) Cleft of lip and palate Colonic perforation Color dilution alopecia Conjunctival dermoid Corneal dystrophy both epithelial (superficial) and endothelial Corneal erosion (superficial) Cystinuria Excess cystine in urine. Deafness Demodicosis Dermoid cysts Diabetes mellitus Ectasia of sclera Excessive tortuosity of retinal vessels. Excavation of the optic disc. Retinal detachment. Intraocular hemorrhage and veriform streaks of the fundus in young dogs. Entropion Folliculitis and pedal furunculosis, bacterial Heterochromia iridis Whitish-blue iris Hyperadrenocorticism Hypoplasia (or aplasia) of optic nerve Hypothyroidism Idiopathic epilepsy Idiopathic onychodystrophy Intervertebral disc disease Juvenile cellulitis Keratoconjunctivitis sicca Decreased tear production. Can progress to increased corneal vascularization and pigmentation. Linear IgA dermatosis Malasezia dermatitis Microphthalmia Small eyes Nodular panniculitis (sterile) Pattern alopecia (ears) Pattern alopecia (ventral) Pemphigus foliaceous Pattern baldness Pemphigus foliaceous Persistent pupillary membrane Progressive Retinal Atrophy Progressive retinal degeneration (standard and miniatures) Renal hypoplasia Sensory neuropathy (longhairs) Sterile pyogranuloma syndrome Sternal callus Ureodermatologic syndrome Ununited anconeal process Vasculitis (idiopathic) |
| Great Dane Acral furunculosis, bacterial Acral lick dermatitis Atopy Cervical calcinosis circumscripta Cerebellar hypoplasia Cystinuria Excess cystine in the urine Deafness Seen in homozygous merles in conjunction with ocular defects. Elbow dysplasia Eversion of the nictitating membrane Folliculitis and furunculosis, bacterial Gastric dilitation-volvulus Heterochromia iridis "Walleye" Blue and white iris Hypothyroidism Megaesophagus Metabolic bone disease Microphthalmia Small eyes Result of merle to merle mating Seen in homozygous merles Mitral valve defects Muzzle furunculosis, bacterial Necrotizing myelopathy Osteochondritis dissecans Osteosarcoma Pedal furunculosis, bacterial Progressive ataxia Retinal dysplasia (Harlequin) Solar dermatosis (Harlequin) Spondylolisthesis Stockard's paralysis |
Chihuahua Cleft palate Collapsed trachea Corneal dystrophy Corneal edema Demodicosis Dislocation of the shoulder Fatty liver syndrome Glaucoma (secondary to subluxation of lens) Hemophilia A, Factor VIII or AHF deficiency Hydrocephalus Hypoglycemia Hypoplasia of dens (odontoid process) Iridal atrophy Keratoconjunctivitis sicca Mitral valve defects Patella luxation Pinnal thrombovascular necrosis Pulmonic stenosis Trichiasis |