This is now the 3rd chicken that acts like this. It's like she's gasping for air, I don't know what to do anymore! Ive made apple cider vinegar and garlic in their water, and they love it. Any suggestions?
Have you seen any sneezing, crackles or wheezing, nasal drainage, or bubbles in eyes? Those can be signs of respiratory diseases. How is the ventilation in your coop? Have you seen any mold?
Have you looked inside their mouths and throats? Sometimes a disease called canker can cause gummy plaque that will block the airway and suffocate the chicken.