So glad that you joined our growing family of yorkie lovers. YorkieTalk is the best!
My Lollie is a piggy-yorkie and had to go on a weight loss program. I chose a slow weight loss plan by reducing her kibble allotment by a few kibbles per day and increased her exercise by more fetches and walk. In the past year she has lost a bit over a pound. She still has a bit to go but she is looking and feeling much better.
With that said, I would suggest a slow and consistent reduction in food (including treats) plus a bit more exercise. Good luck. Keep us updated on Tallulah's progress.