I have one dog that had almost no fur on her back due to demodectic mange when we got her, mainly due to stress compromising her immune system's ability to fight them off. Since a puppy the original family and at least the dad were with her throughout the day, but eventually the dad got a job and so she was left alone for most of the day and sort of freaked and would jump all over everyone when they got home. Eventually they gave her back to the pet rescue place, and when I saw her the poor thing was in a back room pacing back and forth and looking anxiously toward the front door, pretty sure she was looking for her original owners to come back. So anyway I'm sure some of the thought involves wondering where their human pack members are.