For many years on the ranch we used basic H in our stock tanks. The cows loved it. The sheep loved it. When slaughtering our animals for meat the butcher's discovered we had a notable lack of liver flukes and heartworms even though we did not use poor on dewormers. The basic H kept the stock tanks clear of algae and stinger bugs that live in the water in Montana. If there's a downside to using basic H with livestock we never encountered it.
