Birds keep dying- trying to figure out why

[Jmr]

Update this am- she is still alive and was in the roost this morning. Tail is droopy and she has what appears to be explosive diarrhea which is a pale yellow. I called a vet this am that sees chickens and they had nothing available. Is there an antibiotic I can get at tractor supply maybe to try that?

 

[Wyorp Rock]

Can you post a photo of the poop?
How old is the chicken?

 

[ChocolateWingTheRooster]

since these 2 have come and gone, 5 of the remaining 6 have had the same symptoms and then died. Blue green poo, dirty vents, off balance, loss of coordination then death. Death seems to happen about 24 hours after I see these symptoms.

Your chicken’s symptoms sound exactly like what two of mine had! But I only had two die...

I’m really sorry about all of your deaths! I’m honestly nervous a few more of mine might die like this...