Pets with sensitive stomachs may need to transition a little more slowly to avoid any digestive upset. If you introduce the new food too quickly and your cat or dog experiences some digestive upset, just back up to the previous transition amount where your pet wasn't having any trouble and feed that amount for a few more days before continuing with the transition. Once your pet is eating all Halo food, if you switch between Halo recipes, consider a 2- or 3-day transition to minimize stomach upset.