Wishing your poorly girl all the best - her symptoms are making me rather think about teeth problems, a mechanical obstruction in the mouth/throat area, a rash in the mouth/throat area or fungal problems in the same area, as she still has the appetite, but clearly cannot chew/swallow well.
I am very sorry about your odyssey and your first vets not being aware that you need to syringe feed as soon as a piggy goes off food. The shape of the poos is clearly indicating that she is eating too little, but at least she still has been getting some food through, so all is not lost!
Fingers firmly crossed that your new vets can get to the bottom of it all and save her life.
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