Thank you so much for responding. The chickens are the same.

Maybe one of them is 10% better. We have had a vertical learning curve, so we did not know we needed to have anything prepared to separate sick chickens. But I am working on building something today. But it really is only big enough for one chicken. We're having to use scrap materials. We'll have to build a second one later. I know a dog crate would work, but we were over-budget building our main coop & run as it was. So they are all still together. I have been watching them to make sure no one is getting picked on.
To answer your questions, one of them is definitely drinking on her own. I have not seen the other one drink by herself. They aren't really eating much, or at least not that I can tell. They are about 16 weeks old. But we have 3 young kids & we both work, so can't be out there every moment. We have been spoon feeding the sick ones a little water. Their poop had been gross but it has been a lot better -- we called the feed store where we got them and they suggested treating the flock (we have six) with corid because I had seen blood in one of their poops. But now their poop looks better than it has since they came here. Their eyes are ok except as my one son says "they look sad." They are walking but mostly are sleeping standing up or laying down, so eyes are also closed a lot. It is really hot here, high 80s/90s today. The whole area the chickens are in is in the shade.
The other thing was a friend who has chickens suggested treating for gapeworm because we have seen them eating earthworms, etc., but I read this is rare and can mimic respiratory illness. We did give a treatment with Safe-Guard last night which we were told was to be repeated for 4 more days and supposedly it wouldn't hurt to treat them. They aren't laying yet.
I wish I had known so much more before getting chickens. We really felt like we did our homework, but we are feeling completely unprepared especially with ill chickens right away & during summer. Somehow we thought most of the respiratory illnesses would pop up in winter. This has been so tough, we were expecting to enjoy having them but have not been so far.