Awww, sounds like you are IN LOVE
. Too sweet. CONGRATS on your new baby.
As long as you're offering food 3-4x a day, he should be getting enough and eating what he needs. Sometimes too when they first come to their new home, they may eat a little less just due to stress/adjustment. As long as he's not showing any signs of hypoglycemia (common to yorkie puppies), he should be fine. If you are seeing signs of it, then pick up some Nutrical to have on hand.