To be clear: WE DO NOT GUARANTEE THE HATCH RATE OF THE EGGS YOU WILL RECEIVE! Your results will be anywhere from 0%-100%. We hatch every single week the same eggs you receive. If you would like to know what our current on farm hatch rates are, please ask! We're happy to share that information with you. What we can control: -Setting only for breeds that we ourselves are currently hatching successfully. -Closely monitoring environmental conditions that would cause reduced fertility. -Keeping an appropriate rooster to hen ratio based on activity level of individual breeds. -Including fresh, pre-candled for cracked and unbroken eggs. -Clearly marking egg boxes for the postal service to avoid possible rough handling, extreme temperatures and x-ray machines. What we cannot control: -Shipping conditions (i.e. rough handling, exposure to extreme temperatures, delays, x-ray machines) -Conditions under which you incubate your eggs (including equipment failure and negligence). -Abrupt and unpredicted changes in mating and egg laying. -Knowing if a particular egg was actually fertilized at the time of lay without cracking it open, rendering the egg useless (unless you’re hungry for an omelet).