What is King ,the farmer's dog's amazing characteristics or traits?

King's main characteristic is his loyalty to David. King defends him from an attack by the farmer and later follows David when he escapes. When the two of them stumble upon an outpost manned by "them," King sacrifices his life so that David can and will go free. King is an embodiment and/or manifestation of the narrative's thematic consideration of the value and importance of free will (see "Themes").