Preheat the oven to 375 degrees F and line a baking sheet with parchment paper.
In a large bowl, combine the ground venison, breadcrumbs, egg, milk, onion, garlic, chopped rosemary, salt, and pepper. Mix with your hands until just combined.
Divide the mixture into four equal portions and shape each into a small loaf. Place the loaves on the prepared baking sheet.
Bake for 25 minutes.
While the meatloafs bake, combine the cranberries, orange zest, orange juice, and brown sugar in a small saucepan. Simmer over medium heat for 8 to 10 minutes until the cranberries burst and the glaze thickens slightly.
Remove the meatloafs from the oven and brush each one generously with the cranberry orange glaze. Return to the oven for 5 more minutes.
Let the meatloafs rest for 5 minutes before serving. Garnish with fresh rosemary sprigs.