All fingers, toes, hooves and paws crossed here for your horse <<<<<<<<<<<<<<<<<vibes>>>>>>>>>>>>>>>>>>>>>> for her and even though I know you don't 'do' them ((((((((((((((((((((((((((((((hugs))))))))))))))))))))) for you too.
Fingers crossed here that she pulls through Shills.
I had to Google IFEE (I am ashamed to admit) and it was very interesting. I also had a horse die of "colic" who had access to a stream and someone mentioned about the sediment that can collect.
Oh bloody hell Shils. Got everything crossed for you. My friend's horse had to have colic surgery and developed the same thing. It was touch and go for a while but he made a full recovery. And he's 20. Vibes by the ton xxxxx