Treats are training tools, not daily snacks. Use tiny, soft bits—like pieces of boiled chicken or commercial training treats. A Lab will do backflips for a single green bean (yes, they love veggies, weirdos).
Avoid rawhide and fatty treats—they can cause pancreatitis, which is as fun as it sounds. Stick to healthy options: carrots, apple slices (no seeds), or frozen blueberries for teething.
Rule of thumb: treats should make up less than 10% of their daily calories. The other 90% is for that top-notch kibble you bought.