I have a chicken that silent yawns and shakes her head...no other symptoms. she's been doing this off and on for a while now (months)...I look down her throat but don't really know what I am looking at. How do I tell if it is gapeworm or something stuck in her crop? I'd appreciate any advice - and pictures too! CeCe is a lovely nervous girl, would hate for her to be sick if I can help her.