A total of 54 animals of either sex with cystic calculi were prospectively studied. Most often the mature adult dogs aged between 3 to10 years were affected and the juveniles (<1 year) were less commonly affected. Prevalence was maximal in extreme winter and summer. Cystic calculi were diagnosed either by radiography or ultrasonography. All the dogs were given urinary alkalizer and calculolytic drugs to dissolve the calculi and the dogs with urinary obstruction were treated surgically. Majority of the cases showed uneventful recovery.