Ok so I am frustrated & confused....have searched this site for awhile. If a chick has no symptoms but at times is sneezing frequently, is it an issue, or not? Sometimes she also shakes her head, but that is rare. No discharge. No other issues. Normal chick otherwise.
It seems as though there is plenty of advice for dosing my chicken with things, that may or may not help, for an unspecified issue, but so far no one has said, "yes, your chicken has a disease" or not.
My other chicks sneeze at times, but that is what I would call normal I believe for chicks just given dried mealworms in dusty pine shavings

before they drink.
I am dosing flock with electrolytes and probiotics/acv as a precaution. . I have Oregon grape root, an antimicrobial/antibiotic listed as killing MRSA, but am unclear if my chick could use some, needs to dewormed, or what? Furthermore it takes 6 weeks to turn my Oregon grape root into a liquid for dosing. Unless I just decide to add to boiling water (less potent). It is also something that I am unclear as to how to do and in what dosage for a chick.