So it's time to force feed. If you can load this:
then you should look up Starvation Protocol, which gives the makeup of the "slurry" that is force-fed. Anapsid's information is widely trusted and proven.
I can't open anapsid. I hope you can find the info you need. If you can't, let me know, I'll be watching.
In a way, syringing food is like a strength match. You have to overcome her resistance, and her life depends on success. It was always pretty easy for me, but for others it's distasteful or contrary to the human's personality.
There are ways to open Consuela's mouth that are fairly easy, which reduces her stress. In my experience, healthy iguanas react strongly against force feeding, but when they figure out what is going on, it gets easier and some even cooperate. As you do it, you will learn, and it gets easier for both of you. The method I like uses a popsicle stick pressed on-edge to the snout between the lips. You press and hold it there for a few seconds and they open their jaw a little to try to tongue it away, then you put it clear in the mouth and follow with the syringe. Pull out the stick and squeeze a little (2 ml for adults) slurry to the back of the tongue, watch for the swallow, then squeeze out a little more. At first she will not swallow, so pull out and wait for 30 seconds and go again.
Well that's for starters, so to speak, you have your work cut out for you. I hope it goes well. I wish I could be there to help. Let me know what happens.
Um... I used a different formulation for these feedings. IMO it's better. It worked for my iguanas, is less protein-dense and is high-carb, which I think is good. But it would be a lot more print in this already long post. let me know.