hello all! Can someone please help me? Yes this is long but please bare with me. I've got 10 chicks varying in age from 5-10 weeks. They have all began showing some signs of respiratory distress. Some have nasal discharge and sneezing, some have had swollen sinus on one side that went down on its own before treatment began, a few are panting even when not that hot and a couple are gaping. One is gaping more than the others and letting out a loud chirp afterwards. I began treating with tetracycline 500mg in the water and have noticed signs of improvements (but not a complete turnaround) in all but the one that is gaping. I also treated with safeguard-a small squirt in each of their mouths and plan to repeat on 10th day. No where around me has any other antibiotic besides injectable and I was told they are too young. Please tell me what else I could do. I've given vet rx, acv, garlic, turmeric, oregano, cayenne, and more trying to get relief for them. Truly most seem to be on the mend except the gaping one and of course she is my favorite girl! Also I searched high and low even going out of town for an antifungal and the store's "chicken expert" told me chickens can't get fungus and all I could do was give probiotics which I've done every day since they were chicks. Please help me out! Tell me they're not doomed! And I don't want to cull bc they are pet purpose and personal egg purpose only. No danger to anyone else. Also how long should treat with tetracycline and if dosage right? TIA!