Beautiful photos. I like how the first two capture the moment of clearing the hurdle. Personally, I would crop each to remove space behind and below the horse/rider. The last photo captured my attention because the rider was already looking to the next objective... as though "we got this, so focus on the next". I respect that look in her eye. My crop suggestion on the third photo is to bring the attention to the rider's eyes... the horse got this... we're going next!
To me that is the face of determination and a horse of quality.