So very sorry to hear sweet little Prissy is still not eating. I would try ANY food, maybe yoghurt (natural organic plain or flavored) just a little at a time, even maybe try to get her to lick a little off your fingers.
Is she drinking? Just did a quick google and someone has suggested Puppy Replacement Milk. And to use a syringe, eye dropper, to just get a few drops down the throat.
Also Pedialyte warmed like baby formula in case of dehydration. You can tell if dog's dehydrated by taking a gentle pinch of the skin on the scruff of the neck. If it snaps back immediately she's not dehydrated if it takes longer than a second or two, Prissy is dehydrated and getting fluid into her is a must. Use the syringe if needed, be VERY careful though that she can swallow and do NOT give her much at one time. She hasn't eaten properly for a long time, she's a small dog and her stomach will not be huge. Tiny amounts, given often, are much better than one massive amount.
To be honest, I don't think leaving her food for a period then removing it is going to help. Dogs WILL eat if they're capable of eating, Prissy is obviously NOT capable for medical reasons of eating food. No dog will willingly starve themselves they have a strong 'survival instinct'.
Another thing. Has Prissy had a bowel movement? If so what is the stool like? She may have an obstruction in the bowel.
Please keep us posted, I know everyone is wishing Prissy well