@sunflower21 , You're welcome - I did not physically feel the object, so that's my hypothesis of what she had, but the diagnosis will still never be certain. Inhalation of sharp/rough material is fairly common. Here is some information on the topic:
http://www.majesticwaterfowl.org/mmissue105.htm
Do you have a video of her trying to talk?
Considering the suddenness, and lack of other symptoms, it's possible she suffered from tracheal/syrinx damage, which can result after inhaling sharp, or large foreign material into the airway. I have noted the frequency of this problem more common in...