My neighbors 6year old Black Lab,Harley is his name,will go up stairs but will not go down them. He just moved here with his owners this week from an appartment that had two stairs on the porch to an upstairs appartment. They have to pick him up and carry him down the stairs like a puppy. Even treats won't coax him into going down the stairs. Is it a visual problem perhaps??? I told them that i would do some research and see what I could find out. Any help would be greatly appreciated. Thanks. P.S. I though maybe having another dog show him how it's done might be a good idea, then, if it is a visual problem, he can follow his olfactory senses and learn by example and smell.????