Thanks for replying.
We'll have her ride first. :) It's hard to see but in the pic where he has no tack on, his back is pretty straight...it's just that the withers themselves seem pretty tall. Then again...is that what having a sloping back means? Or are you speaking of something like having a sway back? Are they the same?
But yeah, in any case if anything at all is odd about his confo on that point it's a no-go. Just hard to say from these pics.
And I agree...she doesn't look really comfortable up there. I actually have no idea what she's trying to do with those reins. They did mention that he requires "a firmer hand", and that his previous owner left him sitting for around a year (they've only had him 6 months). We'll see what happens tomorrow.