We have some sort of what seems to be a mild respiratory problem going around. Chickens seem to be fine during the day (typical); but have rattlling or whistling breathing at night. We have been treating them with Terramycin for ten days; all seem to have recovered but Whitey. He is older (9 or 10 now). During the day he is fine; happy, running everywhere; eating; fighting, and having fun with the hens. At night he breathes funny; but not every night. I want to take the flock off the antibiotics, but I;m afraid to take him off. If we quarantine him I'm afraid it'll stress him out more, cause he's the boss roo and he'll fret not being able to run with the flock. He's been under a lot of stress anyway as we've gotten hit a couple of times recently by predators, and he has to deal with some new flock members. I was thinking maybe of trying Organic Apple Cider Vinegar in the water? Don't know where to get it, though, Suggestions??? Also, he has lice bad. I'm afraid to use the DE on him (he rarely dusts himself); because I don't want to add to his respiratory problems. But he needs treated with something (hopefully inexpensive) now. Suggestions for that would be appreciated, too.