Rocky was what most would call a spunky cat – always getting into mischief around the house, romping about with the family dog and begging his owners for attention. Then one day his behavior began to change. Instead of his usual routine of near constant motion, he was reluctant to leave his bed on the windowsill. Rather than seek the company of his human companions, he became withdrawn and aloof. His owners, noticing the alteration in his activity level, and concerned about his pet health, took Rocky to the veterinarian. Arthritis was the diagnosis.