What I find often missing in the Arabian, not just SE, is the nice length of femur so you get a good stifle angle.
I see pretty often a good length of pelvis and even the angle of the pelvis is working.
There is much about this in threads on the SE.com and maybe even the beginning here on eb.com.
The other piece that is missing in the SE is the flexibility of the loin. I don't know if that's because of the difference in the number of vertebra, but it's really much different(less) than many warmbloods. But I don't know if you consider that part of the hind end action. I would suggest that it has to do with soft tissue amount/attachment as much as bony structure of the vertebrae/pelvis. I personally like alot of suspension at the trot, but dressage is my preference & I don't know that the Bedouins valued that attribute, it's not a "smooth" ride as such - I don't think endurance riders appreciate it. But I look for it.
I've seen the Ibn Morafic get have good working hindends including good length of femur. And I've seen that Ibn Morafic hindend influence even in his grandget. They are very typey beautiful horses, too, that do well at the EE, 2 I can think of were reserve champions in halter. Amiin +// he was reserve champion in his class, lost to Mishaal HP (who put on a really spectacular dressage trot). Amiin has been working cow U.S. Top 10 several years in classes of 21,28 & 17 as well as Youth Nationals top ten. Frank Sponle's mare, Bint Tasaqqara, she's a grey that is a Botswana dtr out of an Ibn Morafic mare, Tasaqqara, that cut cattle as well - the dam was terrific & all Botswana did was make her a bit prettier, but didn't take away from that dam's wonderful body/hindend - she was my favorite in the 2013 supreme mare championship.
Edited by JacqueB, 16 October 2013 - 02:51 PM.