Hi. My Runner Duck Sage's voice started changing a few days ago. She seemed to be going broody, so I thought it might be related to that. Now she's lost interest in sitting on her eggs and seems to have just lost her voice. She's usually very vocal, but this morning I hear she's not vocalizing, but making breathing/raspy noises instead. I don't see her lungs straining, tail bobbing and her mouth is staying closed, but I do hear those raspy, gurgling noises coming from her. Her eyes and nares are clear. So far she is still eating, drinking and pooping fine. Does anyone know what this might be?