Large Breed Longevity. The average lifespan of all dogs -- both small and large -- is 12.8 years, reports pets.ca, a Canadian pet information provider. Some larger dogs tend not to live that long, and data varies considerably by breed.
Aching Legs. Aching Legs and Feet. Injury is the most common cause of leg pain (aching legs). However, even a simple back pain can cause your legs to ache depending on the degree of pain. Usually, elders and diabetics and people with poor circulation are the ones who experience leg pain especially at night.
Possible causes of body aches include: Fibromyalgia. Pain, fatigue, and muscle stiffness are all symptoms of fibromyalgia, a long-term condition that causes aches and pains throughout the body. Fibromyalgia is thought to be related to how the central nervous system processes pain messages when they occur in the body.