I don't know why I imagined this chicken-business would be easier. My 15 week old Australorp pullet has been getting progressively more lethargic. She doesn't show any other symptoms, palpitated her, poop looks good, I checked and she's not egg bound; but she's clearly not feeling well. She got the ill-chicken-look . It's gotten so concerning that I'm considering treating her with antibiotics even without a diagnosis. I have Sulfadimethoxine. They were all treated for coccidiosis with 6 days of 0.05% Sulfadimethoxine in their water a couple weeks ago. ETA: Everybody else looks great, except that I have a crowing pullet who I might also treat because she doesn't look great (but it could just be hormones?). What do you all think of treating her with Sulfa as an antibiotic to clear this thing up? ETA: The Sulfa drug I have is Sulfadimethoxine a.k.a Albon.