Your dog is a member of your family. If they were to get sick, you would want to do all that you could to make sure they recover and live a long, healthy life with you and your family. Dogs, much like any other pet, have problems that are not often obvious. However, the dog health symptoms are always there. Some things are huge, and other things are not that easy to see. Here are some of the symptoms that can mean trouble, but might not be things that you notice right away. The eyes are the windows to the soul, as some say, but they are also clues to poor health in some cases. You probably spend a lot of time looking at your dogs eyes, but you may not notice the subtle dog health symptoms that can occur.