2 1/2 weeks ago, we added 2 buff orp roosters for future breeding flocks. We have an existing flock of roosters 2 be used for meat chickens so we combine these two buff orps to that flock. Now 1 buff orp and 1 of the existing black australorp are wheezing and making a gurgling sound. This morning I noticed a hen from my other flock starting to wheeze a little. Does anybody know what this may be? Any help would be greatly appreciated.