I have always thought and always been told that dogs have no sense of time. Is this true? I've been told they cant tell the difference between 5 mins and 5 hours. Is this right? I always feel guilty when I leave Shadow on her own, and especially now when my office moves and she'll be on her own for 9.5hrs a day. Will she realise how long she's been on her own? Its weird cos shadow always seems to know what time lee is home form work, cos she starts whining by the living room door and pacing by it, and when I come home lunch time she's always waiting by the kitchen door, fair enough she may hear the front door going, but in the evenings when i come home she's always by the garage door, and I know its not cos she hears the car, because one day I came throught the front door instead of the garage, and she was still waiting at the garage door. So if they have no concept of time, how does she know when I'll be home form work?