As stated the PortionPro Rx is ideally meant to portion out food for one pet in the home. The only instances we would condone assigning multiple pets to the same feeder would be a case where you have multiple animals at a healthy weight that you can trust to self-regulate (almost all the time this would only apply to cats as dogs typically cannot share the same food bowl without guarding and aggressive behaviors). When programming the feeder you would set the total daily amount for the total amount of all pets being fed on that feeder and assign each of their tags as approved with the feeder. This would work well if there is a third pet in the home who is overweight, on a therapeutic diet, or who steals food and needs to be separated from the pets on the feeder.