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Twenty-nine chemoreceptor tumors submitted to the Western College of Veterinary Medicine, Saskatoon, Saskatchewan between 1967 and 1979 were compared with those previously reported. The prevalence was low, with 28 cases occurring in dogs while only one was diagnosed in a cat. Old male dogs and the Boxer, Boston bull terrier and Collie breeds were affected most commonly. The prevalence in Collies (five of 28 dogs) was unexpected but may have been coincidental in this size of sample. The chemoreceptor tumor was often of clinical significance because in two-thirds of the cases it was either the presenting complaint or considered at necropsy to have caused illness or death.