Surefeed pet feeder is your solution. Stupidly expensive for what it does, but it works. The feeder opens only to the microchip of the cat it has been programmed for.

[–] kofe@lemmy.world 1 points 1 day ago (1 children)

I would not be surprised if my chonker baby figured that out and waited until the old lady had hers dispensed then bullied her out of the way. Anyone have tips for preventing that?

[–] spamspeicher@feddit.org 1 points 1 day ago

For the back there is a cover directly from Surefeed which you have to buy separately (again, expensive for a cheaply made plastic cover). For the front there are 3D printable covers like this. If you don't have a 3D printer, people sell these covers on eBay.

And I think there is a mode where the feeder closes when the wrong chip is detected, even if the correct chip is detected at the same time.