Okay, one more time about the Vita Drops. There is NOTHING wrong with the Vita Drops. They can be sprinkled on the pig's food, or syringed to them. It's when you put vitamin C, whether Vita Drops or children's chewable tablets or Oxbow Daily C or any other kind of vitamin C, in water in a container where light can get to it that the vitamin C degrades. The culprit is the light, not the water.
I know Vita Drops says you can add them to the pig's water bottle. But that's not a good idea with ANY kind of vitamin C. I used to give them to my pigs by sprinkling them on their food. And since Oxbow has seen fit to discontinue Daily C and replace it with a tablet high in calcium, I may go back to the Vita Drops when I run out of Daily C.