When it comes to foods not to feed bearded dragons, it’s essential to know what can’t bearded dragons eat to ensure their safety and health. Foods like avocado, rhubarb, and fireflies are toxic and fall under what a bearded dragon cannot eat due to their harmful effects. Additionally, citrus fruits, onions, and garlic are unsafe foods for bearded dragons as they can cause digestive issues or toxicity. If your bearded dragon will not eat a particular food, it may be their instinct avoiding harmful items. Always research what not to feed your bearded dragon to provide a proper, nutritious diet that excludes any unsafe options.