Yes, and even though it was huge it had no malformation that an "enlarged" heart has.
My wife and I had occasion to visit the horse farm, I cannot remember the name, that owned him. One of the stable managers gave us a tour of the breeding facilities and upon learning of her appreciation of Secretariat we were ushered to his stable where
she was allowed to pet him. Anyway, I had always likened thoroughbreds physique to that of a basketball play, lean; forget that, he was huge and muscled, make that analogy to a football player. Oh, and they teach them one thing and one thing only
- to run. They have no manners.