Well, I'm glad your not home, you certainly don't want to cook her comb!I have a 3 month old polish hen that is not eating or walking as of this morning. If she did walk, she walked with a limp. She would just lay down after a couple of steps... Im not home at the moment to cook her comb....She ate a couple bites of grain but that was it.

(sorry, I just can't help myself)
I'm sorry she is not doing well.
What do you normally feed her?
Do you remember if her crop was empty or full this morning?
With a pullet that young it could be a number of things, so try to examine her when you have time. Get a good look at her poop and re check the legs/feet.
Photos of her and her poop may also be helpful.
Is she picked on at all? Crested birds can sometimes have a hard time with others, so she may not have been eating/drinking well.
Sadly, she is about the right age to have Marek's disease show up as well, this is something to consider.
Poultry vitamins won't hurt. If at all possible, collect a stool sample for testing, that would help rule out worms and coccidiosis.