In humans, persistent osteoarthritis (OA) pain not only negatively impacts mobility and function but also causes affective and cognitive deficits that exacerbate the chronic pain experience, leading to a diminished perceived quality of life. OA in pet dogs is common and characterized by similar physical changes, however the impact of OA-pain on affect and cognition has not been evaluated. This significant gap limits the development of novel therapeutic approaches for canines. To address this gap, we need a clinically-relevant way to measure and define the negative emotional and cognitive effects of OA-pain. The overall purpose of the proposed research is to develop a standardized, operational Dog Pain-Related Emotion and Cognition Test Battery (DECTB-P) to evaluate the impact of chronic pain on these domains in dogs. We will achieve this goal by: 1) developing novel emotional and cognitive tasks for domains not currently assessed in dogs, and 2) combining these novel tasks with our already-established cognitive and emotional tasks into a battery that is practical and feasible for both healthy dogs and dogs with chronic pain. Once complete, we will perform preliminary analysis on the discriminatory ability of our tasks to distinguish between groups of dogs. We hypothesize that chronic pain causes changes in cognition and emotion in dogs and these changes can be reliably measured. This research will benefit canine health and well-being by providing a rationale for novel treatments for pain and a tool by which to fully evaluate their efficacy and impact on the canine pain experience.