These pics are of a friend's filly, born in April of 2008. When she was born, her front legs were bent severely
(so much that she couldn't reach up to nurse & had to be put on a bale of hay & bottle fed). You can sort of see it in the first picture (her front legs are pushing forward).
Her back legs were back & for the first few weeks she was actually walking on her fetlocks & not her hooves
(if you look closely in the 2nd pic you can see how her back feet curl upwards toward her belly - you have to look close
The third is of her after a month or two (note how her front legs are still curled, but alot straighter than when she was born) & she's standing rather bracingly on her back feet.
The last is of her as a weanling & her legs are quite normal & staight now as a 2-year-old. They've even started riding her
So there is hope that your guy's might straighten out.