It can be mild, with the dog having no visible vision problems, but it can also be more severe, with damage to the optic nerve, colobomas (defects in the eye tissue), or even retinal detachment, which can lead to significant vision impairment or even loss of vision.
The disease is congenital and is inherited in an autosomal recessive manner, meaning that the dog is either born with it or is a carrier. The carrier itself has no symptoms, but can pass them on to its offspring. It can be reliably detected by a genetic test, which should be done before a dog or bitch is included in breeding. In addition, it is recommended that puppies undergo an eye examination by a specialist.
Gentle and devoted herding dog, known for its noble silhouette and rich, flowing coat. Within the family it is tender and patient with children, more reserved with strangers but not needlessly sharp. It originates from Scotland, and the breed was made famous by the literary and film character Lassie. Intelligent and sensitive, it responds best to calm, positive training and enjoys learning tricks and lighter dog sports. It needs regular exercise and mental engagement rather than long miles. Thanks to its watchful instinct it may bark a bit more at times. The double coat requires thorough brushing, especially during shedding periods. Responsible breeding pays close attention to health, including eye examinations and sensitivity to certain medications. Well raised, the Collie is a reliable, elegant companion for an active household.
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