Oh thats just the bad quality of the shot Hamtastic
#3 has that little sticky out bit too and the 'dark hole' on #3 is actually it pooping >.< It pooped whenever I picked it up :L but yes I have decided now that the last 2 are defo girls, I sent the boy off to Ellie's today, he has settled very nicely
By the way my girls are now called Jenny and Kiku (Japanese for Chrisanthemum)