Welcome to yorkietalk!! That's great that you found the new little ones to adopt. Now your first boy has company
This is the place to find all kinds of information. There may be some ideas about picky eaters in the 'Yorkie Health & Diet' topic on the main forum page. My girls eat just about anything, lucy will not eat dog food with chicken though. I feed them the Taste of the Wild Bison & Venison also. Their website states their food is an 'All Stages' food ~ good for puppies & adults.