If you are looking for a cloth-based item, we will recommend you own at least six pieces of dog period panties. It will allow you to stay in peace with a backup to use in emergencies or when you do not have time to wash the diapers. You can consider buying Cos2be Female Dogs Diapers, Wegreeco Washable Female Dog Diapers, Paw Legend Reusable Female Dog Diapers. But for a disposable item, you can buy in bulk to keep a stock for use in case of emergency.