Hello,
Uh, I would get her to the vet. That is almost guaranteed to be yolk that has burst & she is
expelling. It most likely is not food/squash, etc that she has eaten. It wouldn't come out in that
form. Do you have a vet you could get her to? This honestly is an emergency, so I would urge
you to get her in today if at all possible.
Especially since you mentioned her fat pads being sunken in, she needs
hydration badly.
Let us know how she is doing.
Tracie