I have 2 crates, each with 4 chicks. This morning I noticed a bloody poo in one crate.. None of the chicks are showing physical signs, yet, but id rather give them all a dose of antiibotiics to be on the safe side. My feed store carries Sulmet and Tetracyclene. Which is best for treatment of possiblle cocci, as that's my best guess, consdering the bloody poop.