You might try giving Daisy some coconut oil. If she has some kind of bacteria or protozoan, the coconut will clear that up. It's also really good for their immune system. You can feed her some cold pressed coconut oil, I would syringe about 1 cc into her mouth. Or you can just feed her coconut flakes(plain, unsweetend) I use it on all my animals, sheep, horses, dogs...and it clears up diarrhea lickity split.
I agree with the coconut oil, and also suggest you give her water with a good dose of apple cider vinegar- the kind with stuff floating in it, unpasturized and unfiltered. Everyone can drink the same water, and it may help to get rid of the pH imbalance if it's sour crop. Make sure she has grit available, and sometimes massaging the crop helps, but she'll spit up super-foul water all over you, and in some cases this can also make it worse- one never can tell which way it will go.
Thanks everyone, your prayers worked! Daisy is feeling better today, even though she is still slow. She refused to eat the mixture that I made for her two days in a row, but shw is definately doing better!