Hello and welcome to YT! Petco now sells a wide variety of premium foods. A good quality food is very important for yorkies and any one from the list would be good to try. If you look for a simple ingredient or allergy food that might help as well. I feel just switched from Nutro to Natural Balance Venison and Sweet potato kibble but they also have canned foods available.
__________________ “Never argue with a fool, onlookers may not be able to tell the difference.”  Mark Twain |