My animals (like most pets I believe) know about the time when they get breakfast and dinner and their walk and their post walk snack. If I try to sleep in - I get 4 noses poking at me. When it is walk time - the dogs get restless and start going to the door unless we took an earlier walk for some reason (I try to walk after most of the children have gone away). The end of daylight saving time wreaks havoc on us all -falling back seems to make them think they may never get breakfast again.