Dr. Freesh saw these cat feeders at the AAFP World Conference in San Diego and ordered . Getting some for her cats at home. Rosie has to be on kidney prescription diets and the Feeder-MPF001-angledother 4 cats do not need it. She tried No cats would use a microchip cat feeder box at her home but none of the cats would use it; so this may be the best solution.
They are made by Sure Flap. Go to https://www.sureflap.com/en-us/pet-feeder/microchip-pet-feeder
to see their video.