Transition Instructions: While it’s perfectly safe to stop feeding your dog’s previous food one day and introduce Zignature the next, we recommend a gradual transition to Zignature for up to two weeks. This is especially true if your dog has been previously fed a high Grain, Corn, Wheat or Soy diet. Start by introducing a small amount of Zignature, increasing it daily while decreasing the previous food by the same amount. This will help avoid an upset stomach as it makes it easier for your pet’s digestive system to acclimate.