We make it easy to add to your shipment. You can add to your shipment as long as it is not within 24 hours of being packed. So if we are shipping your order on Tuesday to arrive on Wednesday, the last day to add to your order would be Sunday.
Simply create another order. At checkout choose the shipping option that says "Add this order to my previous order that has not yet shipped and ship them together". If you choose this option, you will not be charged shipping for that order and we will ship spiderlings in all orders together.