The name 'toller' is derived from their ability to lure waterfowl within gunshot range. The breed originated in Yarmouth County, Nova Scotia, Canada. The American Kennel Club ranks the toller as the 87th most popular dog breed. Progressive retinal atrophy (PRA) affects about 7% of Tollers with an estimated 40% being carriers. The type of PRA associated with the breed is known as progressive rod-cone degeneration. The disease causes cells in the retina to degenerate and die. This causes night blindness at first and eventually complete blindness. Addison's disease affected 1% of Tollers in a health survey, an incidence rate 10 times more than the general dog population. Carrier rate is estimated at 18%.
[{"common_diseases": "Addison's disease", "affects_eyes": "n/a", "caused_by_genetics": "yes"}, {"common_diseases": "Progressive retinal atrophy (PRA)", "affects_eyes": "yes", "caused_by_genetics": "yes"}]
[{"common_diseases": "Addison's disease", "affects_eyes": "n/a", "caused_by_genetics": "yes"}] [{"common_diseases": "Progressive retinal atrophy (PRA)", "affects_eyes": "yes", "caused_by_genetics": "n/a"}] [{"common_diseases": "Progressive retinal atrophy (PRA)", "affects_eyes": "yes", "caused_by_genetics": "yes"}] [{"common_diseases": "PRA", "affects_eyes": "yes", "caused_by_genetics": "n/a"}, {"common_diseases": "Addison's disease", "affects_eyes": "n/a", "caused_by_genetics": "n/a"}] [{"common_diseases": "Progressive retinal atrophy", "affects_eyes": "yes", "caused_by_genetics": "yes"}, {"common_diseases": "Addison's disease", "affects_eyes": "yes", "caused_by_genetics": "yes"}]