Sookie is a Swedish Blue we adopted about 2 months ago. She hangs out with our three chickens (hens) and is a very vocal, happy, and affectionate bird. Not sure how old she is, but she laid eggs for the previous owner and has been laying an egg every day for us for about 3 weeks. Just yesterday I let the girls out of the henhouse and Sookie was uncharacteristically quiet. She was excited and energetic and ready for action, and behaved in every way normal throughout the day except she had very little voice. At times, she could quack loudly, but her soft chattering was all breathy rasps, like a person with laryngitis. Nothing seems to have changed in her eating, drinking, pooping, or laying habits. She seems to shake her head a lot after getting a drink. I have her isolated in a spare bathroom in the house since last night where she can swim in the tub if she wants to. Dewormed with Safe Guard in case of gape worms, but she eats and drinks just fine so probably not gape worms. Also started on a tetracycline antibiotic. Any advice? She wants to get back out and run around and do all her usual ducky things, but she just can't quack. This is my first duck ever, and I'm pretty new to the chickens too. Any advice is much appreciated!