Seeing their dog or cat in pain is something that no pet parent wants to experience. Unfortunately, our four-legged companions can experience discomfort for a wide range of reasons. Whether they are hurting from an accidental injury, a degenerative disease, surgery, or simply because they are getting older, pets experience pain for many of the same reasons we do. Because animals are so good at hiding their pain, your beloved companion could be suffering even if they are showing no outward signs. In time, though, untreated pain often leads to disability and/or changes in temperament and behavior.