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Looks like a Barred Rock hen to me. Comb is pretty light colored and it lacks wattles. I've got one very similar and it's about 2 1/2 months right now.
I think it's hard to say it's a hen. Where about's do you live? Anywhere near Deer Lake? Some gal brought me one just like that and she said it just wandered in one day and it turned out to be a rooster. He's meaner than a snake now too but it keep's the cat's and raven's away from the chicken coop. The color of his (your chicken's) waddle's and comb look dark and it look's pretty young. Does it have knobs on its legs where the spur's are developing?