This is a common question people ask. How come we offer Mareks Vaccinations for many of our chickens but none for our ducks? Good question! Here’s the deal: Ducks generally have hardier immune systems than chickens. They have a high body temperature of 107 degrees which makes it nearly impossible for common chicken diseases to survive in the duck’s body. It’s like when you get sick, your body heats up to fever pitch to try and kill diseases. Ducks simply don’t struggle with the same diseases that chickens do. Plus, ducks spend a large majority of their time in the water (if given access to it) and so this prevents lice and other parasites from taking up residence since the parasites will drown. This is the simple reason for not giving ducks vaccinations; they don’t need them!