mercy dog

During WW1, many dogs were trained as ‘casualty’ or ‘mercy’ dogs. They would seek out the injured and carry them medical supplies, or wait with the mortally wounded. – WTF Fun Facts

Source: https://www.historylearningsite.co.uk/world-war-one/the-western-front-in-world-war-one/animals-in-world-war-one/dogs-in-world-war-one/