Young dogs often have healthy joints, but things can change as they get older. As a dog ages, it can begin to develop stiff and sore joints that affect its quality of life. As a responsible dog owner, you likely take pride in giving your pet the best life possible. One way to do so is to watch for age-related health issues and then look for ways to help. When a dog suffers from joint pain, you may wish to buy a supplement that supports joint health.