I suddenly have noticed that 3 of my buffs have developed weird dark spots on their combs and ears. Also feathers are missing on upper chest. This has all started within the last 24 hours. The spots almost look like "mold" spots. This is the best way to describe it. Can anyone help?? Thx in advance. I will try and post some pictures later when I have someone here to hold the hen for me to snap a photo.