Dogs with high levels of psychological stress or anxiety have been found to grey early, and the cellular stress that causes grey hairs has a genetic component in dogs. On average most dogs start going grey around 5 years old, though some start going grey before 2.Click to see full answer. Similarly, you may ask, at what age do dogs start to GREY?It depends, some dogs never go grey while others start to develop a grey muzzle as early as two years old. Just like us, greying varies significantly in dogs. On average though you can expect to see some grey hairs on your dog at around five years old.Likewise, how do I keep my beard from turning GREY? To stop the rest from going grey as well, you can do this: De-Stress. Don’t smoke. Eat walnuts and other sources of copper. Eat carrots and spinach, iodine aids the production of melanin. Drink lots of water, dehydration stops the transport of melanin to the follicles, your facial hair is the first to suffer. In this way, why is my beard turning GREY? Greying is the result of a depletion of melanin in your hair follicles. As you age, the follicles produce less melanin, which causes either grey, silver, or white hair. Beard hair grows faster than hair on your head.Why do dogs faces turn white?A dog’s hair turns white when his body stops forming melanin. Melanin is the pigment that colors hair, and without it, hair is white. Just as it is with humans, aging is the most common cause of white hair in dogs. It is a normal and natural process and is not a cause for concern.