Ok, so I tried moving the line a little forward on my "Pinto" mare;
I'm going to be making fun of myself for that one for a while. I know I shouldn't need to draw a line, I'm just trying to understand the shape/angle I would be looking for so hopefully, someday, I can actually spot this without using MS Paint. I apologize for my rudimentary artwork here; I tried to get both sides of her in this time. I can see she looks like she could be a little back at the knee from the perspective that her knee falls behind the line, but the sample picture provided has the line intersecting with the fetlock which hers doesn't even come close. So maybe slightly back at the knee? I'm sorry if I seem completely stupid here, but I'm really just trying to gain some clarity and knowledge around this. Maybe one day, I'll be giving out the critiques instead of constantly asking questions. Also, like I mentioned above, I'll try to see if I have any better photos of her tomorrow or, failing that, see if I can take some better ones in a few days - although, it being winter with deep snow and indoor lighting not the best, I'm not sure how successful I'll be. Attachment 121660
What I remember learning in school about leg confo is that the "Ideal" leg confo, that red line you have drawn, would have split the leg in half, even on both sides. Her being back at the knee, as minor, or as severe as it could be varies, obviously. For example, my horse is over at the knee, it just means that there is more leg on the one side of the line than there is the other, being back at the knee means that there is more leg, and knee to the back of the line than there is the front.
Does that make a little bit more sense? Probably not the way I explained it. Being back at the knee is less ideal that being over at the knee, from what I have been told, trainers prefer racehorses to be over at the knee, therefore, they have an easier time breaking over, or bending. Behind the knee is less preferred. Obviously the ideal leg, is just that, ideal, but to be honest, I havent seen many horses that do have the "perfect, Ideal Leg!" lol
Like I said, hope my rambling made a little bit of sense to you! lol