In April 1746, British government forces killed 1,250 Jacobite soldiers in a waterlogged field near Inverness, Scotland—ending the last serious attempt to reinstate a Catholic monarch in England. Centuries later, the hallowed moor has become a national park in Scotland: Culloden Battlefield. But lately, informational plaques and war memorials aren’t the only things capturing visitors’ attention. Since 2015, 19 adorable, shaggy Highland and Shetland cows have become critical residents of the historic battleground. As the park’s conservation manager, it’s Ellen Fogel Walker’s job to tell visitors about the importance of…