The story, according to Joy, is that with each successive spoonful Navilyn would spend more time with her eyes closed (while chewing). Eventually she stopped chewing and was completely out. Navilyn slept for a bit before Joy decided she probably shouldn't sleep in her high-chair.
I am sure this won't be the last time we have a little girl sleeping at the kitchen table, as Joy's family is known to do this (I'm looking at Jackson and Reuben on this one).