I have a snorkie he is 9 months old. We put in a doggie door for him to go in in out. He was doing fine until last week he will go down the steps but won't go up them. We don't know what happen to make him scared. I thought he might had slip and fell off. So we went and got some indoor and outdoor carpet to put down on them. He still won't go up them. He loves ham I even put some on the top steps would not go up. There are 3 steps. Would someone please gives me some ideals on what to do. Thanks Judy