There's a few ways to prevent dry chicken. The first is to watch your oven temperature and cooking time. Once the chicken is done, remove it from the heat. Cooking chicken tenders past 20 minutes will usually dry the chicken out. Make sure it reaches 165°F. Another way is to brine your chicken strips before cooking. This helps the meat to hold onto moisture, and also adds a lot of flavor. You can use water mixed with some salt and soak the chicken in the refrigerator for about 30 minutes. Another quick way to do this is to use pickle juice, which also adds a ton of flavor to gluten free chicken tenders.