It can sometimes be difficult to tell. If you are not sure but suspect your dog or cat may be hurting, or is just not acting right, call us to have us examine your pet. Some signs of pain are more obvious, such as limping, but some signs are more subtle and can include: not eating, a change in behavior or normal habits, being more tired and having less energy. Of course, these symptoms can also be caused by many problems, so early observation and action is important.