Okay, a heatstroke. That could make sense since they have dark feathers, even though it wasn't particularly hot today. She was also drinking a lot of water so we made sure to have plenty for her.
Yes, I think so. Or the runny feces could mean she has worms. You can treat worms with diatomaceous earth. Just put some in her feed everyday for a couple of weeks. No problem, I was very happy to answer your questions!!
Yes! We have already put some DE in their food and also some other deworming medicine in their water, so I think if it is worms they should be fine. I'll continue to keep an eye on her to make sure nothing else seems out of the ordinary.