my dog was born on memorial day 2012 and at 11 days old his mother died. our friend the owner couldn't take care of the litter soone family took half the litter and we took the other half of the litter which left us with still nurseing 7 puppies. they all did great and we kept one ever since we've had him we've noticed that he has two differnt colored one is light brown and the other is a VERY dark brown he doesn't cock his head when he walks or anything and he acts like everything is ok but when the light hits his eyes and they glow only one of the glows the other one doesn't does this mean that he is blind in that eye or what