[Studio25]

Advent calendars have a purpose- a "countdown" to Christmas allowing both the kids and their parents to get excited. A lot of pets are "kid replacements" - where the kids have flown the nest or there are no children in the house. I think pet advent calendars allow pet owners the same anticipation as parents (although the animals themselves don't care).

Having said all that, I think they should be warned about the drool puddle they'll get on Boxing Day, from the Pavlovian response: "He's going to the notice board! Here comes my treat! Here c... Hey where's my treat!?!?"