The natural life span of the border collie is between 12 and 15 years, with an average lifespan of 12 years. The natural life span of the border collie is between 12 and 15 years, with an average lifespan of 12 years. The median longevities of breeds of similar size are usually 12 to 13 years. CEA is a congenital, inherited eye disease involving the retina, choroid, and sclera that sometimes affects border collies. In border collies, it is generally a mild disease and rarely significantly impairs vision. However, other eye conditions such as PRA slowly disintegrates the retina and can cause border collies to lose almost all of their vision at night which can progress into complete daytime blindness.
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