In summary... A heart horse isn't waiting out there in the pasture to bond with its destined human. We make heart horses. Humans initiate the bonding process.
I'm going to have to disagree with you there.
My heart horse knew the moment he saw me that I belonged to him. It took me about a month to realize what he already knew.
I didn't like him, didn't want anything to do with him, but he was immediately smitten. He'd follow me down the fence line, whickering softly to me. Whenever I'd look in his direction he'd be staring at me, head up, ears pricked, and eyes bright.
How do you NOT respond to something like that?
We had our ups and downs, and he wasn't the easiest horse in the world to ride, but he had my back and he knew I had his. We were each other's courage, and together we were more than each of us was separately.
We quite simply adored each other, and the day I had to let him go my hand was on his neck, and my voice was in his ears. I told him it was okay to go, and I'd be fine; he could rest. He visibly relaxed when I said that, and didn't fight the euthanasia drugs.
I love my other horses, but none will be like Conny. JJ comes the closest, although Casper is a close second. Casper picked me as his human too, but I think it's a bum deal for him. He so desperately wants to be my one and only, but as much as I love him, the bond isn't the same.
So no, it's not always
the human who initiates the bond.