Cystic Calculus in a Dog

A 1 1/2 year-old maIe black Cocker Spaniel was admitted to the Stange Memorial Clinic on Dec. 30, 1949, with a history of having been run over by a tractor several months previously. His condition had become steadily worse since that time, and he was unable to control the voiding of urine. The dog displayed an irritable and snappy disposition when first approached for examination