Seems like the lighter one looks a lot more scruffy then the two darker chicks. Ophelia is 6 1/2 weeks and according to the awesome people in the "What breed am I" section she's been identified as a Salmon Faverolle.
Here is what she looked like when I got her
DSC_0004 by StonesChickens, on Flickr
Here is her at week five
IMAG0121 by StonesChickens, on Flickr
and here is what she looks like today
IMAG0467 by StonesChickens, on Flickr
Here is what she looked like when I got her
DSC_0004 by StonesChickens, on Flickr
Here is her at week five
IMAG0121 by StonesChickens, on Flickr
and here is what she looks like today
IMAG0467 by StonesChickens, on Flickr