It's hard to say, but the shipping could have had something to do with her illness. Dehydration from shipping can lead to impaction in the GI tract, and since she may have been hungry she could have overeaten the food or grass or drank too much at first, complicating matters. I'm glad to hear she is better and is eating. The Corid may be good to use still since changing soils will expose them to new strains of cocci (there are at least 9,) and won't hurt her to give. Or you can watch her, and treat if you see her getting sick again. It just seemed to me that she hadn't been on your soil long enough to get cocci when she first became sick.