Arthritis refers to a set of painful conditions that affect the joints and includes osteoarthritis, hip dysplasia, and rheumatoid arthritis. Dogs suffering from arthritis often have considerable difficulty moving affected joints which become inflamed and painful. Inflammation does not only occur in older pets, young pets can also experience inflammation caused by an injury or post surgery. You can easily detect symptoms of inflammation or arthritis when you notice your pet is experiencing unusual limping, or reliance on certain legs when walking. Your pet may either become less mobile or have difficulty sitting or standing and may have become uninterested in going for walks and may avoid stairs.