My chickens have gotten colds from time to time, however this seems to be lasting longer than usual. My naked neck turken has had a cold for the last couple of weeks. I kept thinking it would go away and it hasn't. She just sneezes occasionally, but this morning when I let the chickens out of the coop her sneezes seemed more intense. Her demeanor hasn't changed at all and she continues to eat and drink. Ideas? Any cures?