I wish I could post a pic, it would help alot, but my camera is broken. Yesterday I noticed a ring of what looks like blood on the feeder. I have a circular metal feeder that looks like a bucket in a slightly larger around tray and it hangs about six inches off the ground. The ring of "blood" (it's reddish brown and dried) is exactly where their combs and heads rub when they eat from the tray. I checked them all for cuts or abrasions but I couldn't find anything. Has anyone out there encountered this? Could they be pecking and or biting each others combs? If so, I couldn't find any scabs that would indicate recent wounds. I'm perplexed.