Some grooming shops will provide feedings especially for long duration appointments. If you're going to allow your customers to choose feeding options for their bookings, you'll need to configure the feeding items first.
When adding feedings, they must already be added in Setup, lists as this is where it will pull the item from. If you have not already setup your feedings, you should go do that now. Once added, return to the OLR setup.
Your editing view:
Your customers view when making a reservation:
Once you have a list of feedings, you can use the up/down arrows to re-organize your list if you wish.
Note that in the image above, the text with instructions on choosing feedings, is custom. Learn how to edit that text here: OLR Boarding "customize pages" explained