ive seen a few things on here about if you shine a light in to your yorkies eyes and it makes there eyes green then they will have a silky coat. well thats not true you cant tell if they will have a silky coat by doing that. dogs of all breeds will reflect a green glowing light as they have whats called a tapetum, its a mirror like membrane that reflects light that has already passed through the retina a second time. some dogs dont have a tapetum so will reflect back a red glow like a man or woman which are the blood vessels in the eye. puppys reflect back blue as there eyes are not fully developed yet as like babies that are born with blue eyes that might later change colour. you can find out more by going on google and putting in
www.animaleyecare.com/index.htm or
www.about.com then put the words animal eyes in the seach box and read more about it.