My beautiful Rooster has had symmetrical black (sometimes moist with blood) scabs on both sides of his comb near his nostrils for at least a month now. They have not seemed to cause any problems. But he has slowly been developing a wheeze - today it's really bad. Then I noticed he has more marks appearing on his comb as well. Here it is from both sides: Extra info: -Mouth, throat, scales, skin are clear and free of mites/abnormalities -Still wheezes through mouth so it's probably not just blocked nostrils -Free range but does not have contact with outsiders -Very gentle and does not pick fights -The flock is in molt, a few hens are really bad looking. One has had a wheeze since being attacked by dogs a year ago but it has never spread to any others. -Egg production is low. Possibly related to the molt. -Wheezing was first noticed when he was crowing loudly about a month ago but did not become noticeable during normal activities until the last few days -A few hens have small black marks on their combs as well but that may well be from "fighting" (not much) Recent(ish) changes: -Added 2 Black Australorp hens a few months ago. They have never shown signs of sickness. -Added 5 Muscovy ducks about 2 weeks ago (so after the scabs but before the wheezing) but did not let them out until a few days ago PLEASE!! I could really, really use some opinions!