[capt_noonie]

Uni had always been a picky eater. She would go the whole day without eating sometimes, and start throwing up yellow foamy bile, a tell tale sign she was hungry, but was still holding out. The thing that changed her overnight was getting her spayed. Best decision I ever made in my entire life. Now mealtimes are no longer a headache or a battle.

Until then, you've gotten a lot of good advice here already. Dogs don't starve themselves, but they are however, really stubborn, esp yorkies. They know they just have to hold out one second longer than you. Are you giving her any treats during the day between meals? Yorkie puppies are so tiny, and their stomachs the size of a golf ball, one or two bites of treats between mealtimes will fill them up and they won't be hungry.