Oh yes, definitely sounds like molting. All birds do it, but sometimes they do a slow molt, losing only a few feathers at a time so that you really don't notice it. But other times they may go through a hard or fast molt, and they lose a LOT over a week or two (or three). Adult chickens molt once a year, and it's generally in the Fall. Right now my BA is going through a hard molt and looks terrible. Each morning it looks like someone has torn open a feather pillow over my dropping board. The others have gradually molted, so it's not really noticable.
Because feather regrowth requires a lot of protein, egg production typically stops, or severely decreases (because egg production also requires a lot of protein). You can help by upping the protein your girl gets. Gamebird feed, sunflower seeds, meats, etc. can help while she's molting.