Oh my! That is not something I understood as a newbie. Three of my seven hens clearly molted and look fabulous and the others have not, despite their age! Thank you so much everyone! I'd be even more happy if Jackie's eggs find a way to get back to normal too, but I won't hold my breath, as it sounds like it might be a separate issue. Last night, while still worrying, I came across this article:
https://agreenerworld.org/wp-content/uploads/2018/05/TAFS-13-The-Prolific-Hybrid-Hen-v3.pdf
(Wyorp, I lived on Ocracoke for 6 years. Miss NC but love it out here too)
Thanks everyone!