The correct word is "their."
By the way I checked your post history (yes, I'm on vacation and have the time) and you seem to be a legit poster, so my apologies for calling you a troll.
You have to admit however, that posting such disparaging (and yes, INCORRECT) statements about osteopathic medicine are bound to (1) upset people and (2) make you appear to be trolling.
Besides, one of your main arguments is that DOs will "never the same" as MDs. That's the whole point! If you didn't want to be a DO then be an MD. Simple. Finally, for someone that touts the virtues of having an MD instead of a DO, your post history has many posts asking people if they know this or that program accepts IMGs. I thought the magical letters "M" and "D" were all you needed to open the world of medicine? Yes, it sucks but DOs and IMGs are sometimes discriminated against by PDs. Oh, well, it's their loss.
Anyway, I'm glad you're finally in a school that you feel confortable with, but don't disparage those of us that chose a legitimate and alternative path to becoming a physician. Good luck with residency applications (let me guess...you're doing OB?) and wish me luck too, since I'll be doing that soon as well.