As long as she is eating and drinking, that is good. Some recommend buttermilk with a little cooked rice to soothe the bowel, and give probiotics. If she seems cold you could continue to keep her warm. It might be best to get her back with her same age chicks to remain in the pecking order, but a wire dog crate would be good to separate without problems. If she perks up, I would put her back with them. I don’t know why some countries do not make amprollium available easily.