Just looking at pics of horses on line for sale and trying to learn. This one taller than Okie but weighs less. She looks thin to me and her butt looks different. What should I be looking at?
I am not a good judge of anything but Arab conformation, often getting the answer wrong on these questions in horse magazines. I think people who know QH and TB type conformation better than I do would say she has a small light hip where they would want a lower and wider, larger hip and rear end. What you could see is that the point of her hip is higher, her tailbone higher and her butt more horizontal than quarter horse people like.
But for a pleasure horse, those details may never cause you problems. She just isn't muscled. More groceries and some regular exercise would fill her out.