If the found pet you posted is no longer in your care and you wish to remove it from your account, you have two options.
If the pet was reunited with the family, simply log in to your account and navigate to your found pets on your dashboard. Under their picture, click the purple Mark as Reunited button. This will prompt a new window asking you to confirm.
If the pet was not reunited but you may have needed to surrender to another organization or person who can set up their own found report on Petco Love Lost, you can just remove the pet from your account.
To do this navigate to the picture of the the found pet under the Found pets heading on your dashboard. Click on the options tab and a small window will appear. Click on Remove Pet.
A pop-up window will appear that will ask for a reason why you are removing a pet from the found network. Enter the reason and any additional details in the message box. When you are done, click on the purple Remove button.