The best way to prevent your dog from eating red pepper flakes is to keep them out of reach. Dogs will eat everything they can get their mouths on, so it's essential to be vigilant about what they have access to; for instance, if you're cooking with red pepper flakes, keep them out of your dog's reach. Avoid leaving food lying around that contains red pepper flakes, as your dog may be tempted to eat it. After eating spicy meals, wash your hands thoroughly before petting your dog, as they may inadvertently ingest the flakes. Clear the tables and counters of any food that contains red pepper flakes.