. . .not coccidiosis or parasites. I've taken poop samples to two different labs and each has come back negative. My girls are 16-20 weeks old, and their symptoms have been going on now for the last two weeks, to varying degrees: Their symptoms: lethargic; jelly like clear and sometimes bloody poop; lots of weight lost to the point that their breast bones are sticking way out; started with my Ameraucana, then went to my Barred Rock, then my Wyandotte. Now my Welsummer seems to be a little droopy, though thankfully not to the point that the first two were at. They're all losing weight, but only seem to be droopy and lethargic one at a time. Sneezing very occasionally; I have chalked it up to dusty bedding and/or eating too fast. They were losing a lot of feathers at one point, but not molting. I have done everything I can possibly think of to get them feeling better, and they've improved somewhat but still aren't putting on weight and at least one at any given time seems to be lethargic. So far I have: given them Wazine, stopped after one day and switched to a different wormer, per the vet's directions. They were on that for a day, until the first poop results came back negative for parasites. I was then told to switch them to an anti-coccidia medicine, which they were on for two days. Then the next poop result came back negative for coccidia. They did seem to improve with the Sulmet, but if they didn't have coccidiosis, I have no idea why that would've helped. (Maybe it was just a coincidence??) My vet has no idea what could be wrong with them at this point. This situation seems to have also stumped a vet professor at the local university. Is there anyone on this forum who has heard of these kind of symptoms??