Our mealworms are raised and bred here at our farm. We work with our mealworm farm on a daily basis. Our mealworms receive a very special secret diet that contains the nutrients and protein that your animal needs that will be consuming them. Mealworms should be kept under refrigeration between 42 and 50 degrees, where they become dormant and stay in perfect condition for 30 - 45 days.  Mealworms come in various sizes for your convenience (mini, small, medium, large, or mixed). We recommend medium for most uses. Prices are the same for all sizes.