Hello everyone! I have a flock of 3 White leghorns that are around 3 years old. Originally I had 4 but I had to put one down two weeks ago. The hen I put down had gotten sick but I never knew the reason. She just appeared depressed for a few days, then started isolating herself, then diarrhea... I couldn't continue to watch her suffer. So within a week I was able to get her to the vet but needed to put her down. I was able to get a fecal sample from the remaining hens after that hen passed to check for parasites which came back negative. Now I'm looking at another hen, 3 weeks later, appearing to be slower than usual. So far regular looking poop. She was standing in the nesting box today for a long time..not sitting. And no egg. She wasn't eating a whole lot either. She seemed to drink plenty. Now tonight when I went to observe after the girls went to bed, I saw she wasn't sitting while roosting. Just standing there falling asleep. I feel so bad. I am going to get her to vet... I just wish I could figure out what's happening here. For additional info, these hens have a rather large coop and are mainly confined to a 10 x 10 enclosure with sand. I feed them those dried black solider flies as treats. And give them greens of some sort regularly.I do apply DE to the run and coop/roosts. ACV daily in their water. If anyone has had any experience like this? Or suggestions? Thank you!