What clinical sign might manifest in very young pups suffering from the red cone dysplasia 2 form of PRA?
Answer
Night blindness in very young pups
Progressive Retinal Atrophy (PRA) is a category of inherited diseases that cause the slow degeneration of the retina over time, ultimately leading to blindness. Collies are specifically prone to a variant called red cone dysplasia 2. This particular form is distinguished by its early onset symptom of night blindness, meaning the affected pups struggle to see in low-light conditions. As the retinal degeneration progresses, this initial difficulty in darkness escalates until the dog potentially experiences total blindness within a few years.
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