My parents are currently dog sitting for my sister while she is deployed overseas and every night at 7 the dog sits and stares at my mom and dad until they get up and get him a treat. It is super sweet.
Do you ever lock yourself out of the house? I seem to be doing it a lot lately. Thankfully we have the best neighbors ever because they keep a key for us. Luckily they have been home every time we have done it too!