It can put more than 9 items in the home in part of “Adoption”?
Which file should I change ?
Answer: No need to change any files. The options are in the WordPress backend in the PetCare WordPress Theme folder. Just look for the appearance section and edit the items in there. If that does not work you can manually edit the HTML of the page. Here are some example pages where this was done successfully: ComproGear Wide Calf Compression Socks and ComproGear How Tight Should Compression Socks Be?. These pages are unrelated to Pet Care, but are using the same appearance editor as the PetCare WordPress Theme uses to add multiple items to the page like you are attempting to do. It's not too hard to make this change once you see it active on a few other pages.