Used Sure Petcare Surefeed microchip cat feeders, to keep your cats from stealing each other's food.
Our cats have now learned eat all their food without stealing, so we don't use them anymore. One has slight cosmetic damage from our hungriest cat trying to scratch it open. The manual on how to reset it and train your cat to use it is online. They work really well.
Originally bought for $199 each. Asking $100 for both.