Last night I had a week old chick acting very lethargic. She also had a watery, foamy poop. She was also not eating or drinking, although she had been eating a few hours prior in the yard. I was pretty convinced it was cocci but did not have any corid, so I made a solution of ACV and pure maple syrup in water and syringe fed her that before bed and once in the middle of the night. By this morning she was eating, drinking, and had more energy. She also had 2 normal poops. I've picked up some corid this morning as well as some probiotics, electrolytes, and vitamin/minerals for chickens. Would you give corid even though she's acting better today? There are 3 other chicks (3 weeks old) in the brooder with her (or they were, until I separated them). Should I treat them as well? They all seem completely fine.