It does sound like there is something going on with her crop at least (she may have more than one problem is the other thing). I would keep trying to get water and soft food down her and massage her crop, they usually do not recommend giving course stuff since you want to get things moving through the crop, mash should be fine as long as it is really finely ground bits.
I would not worm her right now, I would consider worming some of her flock mates right now to see if they pass a bunch of worms and if they don't them put the worms as the problem possibility at the end of the list.
Would def give the Nystatin if you started, it is an antifungal, what they use for sour crop. Would also give yogurt.
Corid should be fine, just do not give vitamins when you are using it since it is a vit b / niacin inhibitor and won't do any good.
I would not worm her right now, I would consider worming some of her flock mates right now to see if they pass a bunch of worms and if they don't them put the worms as the problem possibility at the end of the list.
Would def give the Nystatin if you started, it is an antifungal, what they use for sour crop. Would also give yogurt.
Corid should be fine, just do not give vitamins when you are using it since it is a vit b / niacin inhibitor and won't do any good.