My duck is making unusual sounds. Beside regular quacking, she started doing this squeeking quack and loud high pitched yell. She sometimes makes strange coughing sounds even though she is healthy. Anyone knows what that could be? Could she be imitating dog barking or some other sound? She's in contact with dogs a lot so I guess it's an option. Ps, she is over a year old runner and she didn't sound like that before. She hardly quacks now. It might have happened when I introduced a drake.