I have tried making a porridge of digestive biscuits in water, then feeding into the side of the mouth, over the tongue, using a large bore syringe (no needle obviously) a little at a time. Hold her chin up a little until she swallows. The best type is a catheter tip syringe, the kind used for a lamb feeding tube. Digestive biscuits will give her sugar and roughage, which might keep her rumen going. If she likes that then she will progress onto bits of biscuit, again pushed onto the back of her tongue, which have the added incentive of crunchiness.
If your trees are starting to break buds, she may take leaf buds and pussies from willow if you pick them for her, or stems of sprouting broccoli. I'm sorry I don't know where you are Twizzel, but you may have cow parsley leaves appearing, she should love those and clover.
These should start her wanting to eat again

but I expect she's had enough for a while.
Is she passing urine, wind (both ends) and pellets? If not stand her every time you go to her.
Good luck.