Nicademus, I am going to hitchhike on your post as I have some of the same questions.
My Houdan hen has gone broody - she is on Week 2 - and I am wondering if I need to worry about her or just let it run its course.
I can tell you I removed the wooden eggs I had in the nest boxes and she is happy to steal one laid by one of my other hens or sit on nothing after I gather eggs.
She does eat & drink and, once I toss her out, spend some time freeranging with the rest.
I've cleaned up some messier-than-usual poop in the coop which I suspect may be hers.
The only benefit is she is so cranky the others have stopped pecking out her crest so it is getting a chance to grow back
She grumbles at me when I evict her from the nest, but allows me to take any egg she's sitting on w/o a Major Hissy.
Her voice has changed - like I said she kind of grumbles in a voice deeper than her usual - she was always a pretty vocal hen. To me it's really funny - I tell her I understand, PMS is no joke...
And she does puff up her feathers some, but then setles back to her normal shape.
I'll be interested to see what other posters have to tell us...