Hi everybody, so basically i had one baby chick that starts snizzing and opens the mouth very wide like trying to breath or like something inside is bothering, but now all the rest of the chicks have the same symptoms, im planning in putting them in antibiotics but the only one that i have available in a local feed store is duramycil, can anybody help me a little with the dosage? Some chicks are 4 weeks old othersare like 2 weeks old