I have seen cows drink from putrid water puddles in a feed lot when all they had to do was walk 100 feet to a clean water trough. Bout made me sick to be honest.
I'd say they will drink just about any water they find but in the long run I doubt it's the healthiest thing in the world so I'd suggest you haul in fresh water and fence off the swamp.
I'd say they will drink just about any water they find but in the long run I doubt it's the healthiest thing in the world so I'd suggest you haul in fresh water and fence off the swamp.