Once an order is placed with Bigdogs.com, the opportunity to cancel or modify it may be limited. Typically, if you wish to make changes or cancel your order, it is advisable to do so as quickly as possible. This is because orders are often processed and shipped promptly after placement. If an order is already in the shipping process, cancellation or modification may no longer be possible. It is best to refer to the specific policies outlined on their website regarding order cancellations and modifications, as these can provide the most accurate and up-to-date information. You can find this information by navigating to the relevant section on Bigdogs.com. Additionally, if you have questions, the website may have appropriate contact details to inquire further.