Actually, her neck isn't long, when I look again. Horses use their neck for balance, so a longer neck can be better if the horse is doing stuff like reining or dressage. Interestingly enough, (I just read this) longer necks are actually less flexible. Or rather, cannot flex into as tight of an arc as a shorter neck. Same number of bones in all necks (human,, giraffe, horse) Ithink it's seven cervical bones. Anyway, if the bones are shorter, then the flexible links are close together, meaning that the neck can flex in a tighter arc than a horse iwth aa long neck. Most important that neck is correct length for the back. Your horse neck/back looks about right to me.