What is pet item is used for? Just about anything you want to use it for actually.
A Pet item is used when you want to create a series special posts with a special Gallery of selected images
just for that . You must also create a page for the PETS to be displayed on and add a PET Section.
You can create multiple pages for single pet categories to be displayed or just one page that will display all the categories.
The choice is yours. You can also choose how your PETS are displayed when you create the PET Page (s) in Page Builder.
You can choose to show a particular category on the PET Page you create, or you can choose to show all category filters on it.
You can choose to show the title, the bio and the specialty if you desire on the grid of the page you create or nothing at all except the featured the featured image. Get creative. Those decisions are up to you.