What horse breeds are warm bloods?

Historically, the only two hot blooded horses are Arabians and Thoroughbreds.

Cold blooded horses are all the draft breeds.

Every other breed of horse is considered to be a warm blood.

Answer2:

The answer above is correct except for the fact that the Arabian and Thoroughbred are not the only two hot blooded breeds, this group also includes Anglo-Arabians (an established breed in France) Akhal-Tekes, Caspians, Marwaris, and Kathiawaris.