I have a four year old cayuga duck, the past few days I have noticed that when she goes to quack not a sound comes out. She has been completely normal otherwise, eating, drinking, dabbling and doing ducky things. The only changes that I have noticed is the past two days she has not laid an egg, but she isn't an everyday layer. And her best duckie friend doesn't hang out with just her anymore. We introduced new ducklings to the group about a month ago and they are all getting along great. Is it just age catching up with her? She also has an old injury from two years ago when she survived a fox attack, gashed up her chest, neck and back. Anywhere she was bitten turned her feathers white. Sorry for rambling, just wondering what would cause the loss of voice.