How about a smart Dog or chicken door?
How about a smart dog door that would let ONLY your tagged pet in or out and that could be programmed to restrict access to certain hours. Entry/exit activity would be logged.
The same could be done with a door for a chicken coop. I had one that would close at dusk, then open again for a minute to let in stragglers, then it would close again and open at dawn via photocell.
[Mod Edit] Merged with an existing wishlist topic. Give it a vote to help it along!