Acana! This has been such a successful food! We've been using it since October-ish with amazing results. They've also both done well on Wellness. You can order a HUGE sample pack from Luke's and then if you don't live by a store you can order through there or another online store. If your order a large bag the shipping (even though expensive) won't matter too much because it will last so long. Good luck on the food hunt. I think this is something all yorkie owners go though lol
Acana is def on the top of our list