At first I was going to disagree with you, but there are indeed some pictures where she looks camped out.
If you line the point of the hock up directly under the point of the butt, which is the case in the 3rd picture on the top row, you see that the lower leg is angled under the horse. That is sickle-hocked.
But in the 4th and 5th pictures, she looks perfectly camped out - not a lot, but some. The cannon bone is vertical, but the point of the hock is behind her. So, I think until we see a true comformation picture (all of these appear to be at some small angle, which is more likely making her look s-hocked in the 3rd picture when 4&5 are a better representation) it’s a bit of a guess. I’m leaning towards camped out though. Not bad, just a little. Even if she’s s-hocked, that isn’t bad either.
As a rule, sickle-hocking will result in more extravagant movement in the front legs, and there will be greater engagement of the hock joint.
I think I’ll disagree here Lots of WP horses are sickle-hocked, as they feel it aids in the hind leg having more reach (engagement) but those horses are flat flat flat up front
The little lunging you are doing should not be a problem.
Agree, 5-10 minutes a side, assuming it’s mostly walk with some trot, no cantering, is not a lot at all. How short/long are your side reins? What are your goals in the lunging? What you’re doing in those minutes may be a problem, but probably not the length of time.
If the mare is sensitive in the loin area, I would either suspect the saddle or the way you are sitting it.
If the saddle is making the loin sore, then it’s either much too big of a saddle, or sitting much too far back. The loin should be well out of range of the back of the saddle. So sitting in the saddle, however badly, shouldn’t cause soreness there.
A saddle whose tree is too narrow for the horse on which it is being used is one of the biggest offenders for creating loin area pressure points.
Agree. A poorly fitting saddle can cause all SORTS of compensation issues, including in the hocks and SI area, and both of those can cause soreness in front of the SI. Even wither soreness can cause soreness in the SI/loin area.