I'm not sure if it's a cold or something else, but a couple of my meaties are making a gurgling sound when they breathe (sounds almost like a coffee percolator). One of them keeps opening and closing its beak like it's struggling to breathe. They are eating and drinking and acting normal, just sounds like something respiratory. They are 6 weeks old and free range around my backyard, and are in an outside tractor coop under a heat lamp at night. I have a total of 25. I am giving them apple cider vinegar and electrolytes. I'm not sure what else to do. I've read several of the other threads on treating colds and many recommend antibiotics, but since I'm eating these, I'm not sure if I should treat them differently.