Welcome to YorkieTalk!!
I feed mine raw so I never have to worry about an off day, but when I fed kibble I always added a bit of fat-free plain yogurt or cottage cheese 2x a day to a little bit of kibble. For some reason that's just enough yummy-ness to get them to eat
Watch her tonight for vomitting and/or diarhea. She may get a little tummy upset from the switch in food so just watch for that. Good luck and we would love to see pictures!