Hi Cara,
I will make a comment on each of your paragraphs. Keep in mind that I am not a vet....I have just been doing this a very long time. So understand that some of my comments are just to provide you with points of conversation to discuss with your vet.
Let her eat anything she wants. Pumpkin is fantastic. It has lots of nutrition and fiber. I use pumpkin and mix in Critical Care or even medicine from time to time. Anything that is bunny safe....let her have at it in unlimited quantities until she heals up. And she really wouldn't go into stasis....it would be another type of event. However, these types of events can be easily worked by doing exactly what you are doing. Don't sweat that. Now if she doesn't start eating morein maybe 5 days....my concern level would start rising.
Force feeding is usually a challenge regardless. It would only add stress to the mix at this point. Let her rest and she will come around as time goes by.
Sounds like she has quite a buffet. Something that works great for us is dandelion greens. But I think she should be able to find something in that offering that will tempt her taste buds as she recovers. I think you have excellent coverage here.
She certainly shouldn't be feeling any pain. Just wondering how much does she weigh? That is a huge amount of Buprenex....both in actual dosing amount and times administered. I suspect it is at the higher range of dosing but that is a lot. She must be really tripping. Since I am not a vet, I can't discuss actual dosing but I would really be interested in knowing her weight and how they came up with that amount. I don't think it will hurt her...but she should be in no discomfort at all. Might want to bring out some of the hippie stuff from the '60s...maybe some tie dye, a lava lampand a VW Van...LOL....cause she should really be on that "Magic Carpet Ride". I would ask the vet about how long to use the Metacam. It is vitally important to protect the liver when using that drug long term. In wildlife, 3 days max. I have done it longer with domestics but with additional hydration support. You certainly also have coverage with the Procaine and Baytril. I am not a big fan of Baytril but since it is being used in a secondary support role....you should be OK. The Procaine is very effective at taking care of most of the bacteria that might cause a problem. I hope the doctor told you that Procaine (Bicillin) is safe only when injected. It also is quite uncomfortable when it goes in. I usually buffer the shot by mixing the drug with Lactated Ringers....a two for one injection. Baytril also seem to be more effective when injected rather than offered orally....maybe something to do with the pH in the gut.
Why take her in for fluids? Get trained and do it yourself. Most vets charge upwards of $30 for one round. A bag of fluids with a drip infusion kit should be less that $10. A new needle every day only a few more cents. Plus by doing it yourself, it saves a lot of travel stress since some buns don't like travel. I do it a little differently (I use a butterfly catheter with a large syringe) but it is usually easier to learn the regular drip method first. I use my method with wildlife since it is much quicker. Any entry level vet tech can teach you easily in just a few minutes. And, as I have mentioned many time previously on this forum, being capable of adminstering fluids can be a life saver....it has here many times and has literally saved hundreds of animal both domestics and wildlife.
Have you missed anything? Yep. A big pat on the back for doing such a good job. From what I see, it looks like you have all the bases covered. Great work.
Randy