This is true. When I was first married my wife and I lived in Toronto. I worked from home and she had a job downtown that she traveled to and from via bus. The bus stopped about a block from our home. Her arrival home at days end was pretty consistent because it followed the bus schedule and then just a short walk of less than a minute. She'd normally come in the door about 5:20.
Every day our two setters would loll about doing what dogs do when they can't hunt. At about 5:00 pm every day, they would get up and wander around a bit...get a drink or whatever. At 5:15 they would get quite antsy and then go sit beside the front door. They usually only waited a few minutes before she walked through he door.
It was like clockwork and I never said anything to them.
