I have been diluting Vetark ProC in the piggies' water and sprinkling it on their food for the past two days. The first time it was mixed with the water and I poured it into the bottle, I saw a brown speck and a floating sliver of plastic. I fished them out, thinking that the brown speck must have already been in the jug (although unlikely because I had checked it was thoroughly clean before using it). The piggies loved the water and Bianca has even been accepting the powder sprinkled on her nuggets (we've given up on getting Fibreplex down her.) Making another batch today, there were more brown specks which, without any doubt now, must have come from the powder. Taking a photo of a couple with zoom magnification, it looks as though they may well be lice of some sort (dead) -- unless, that is, the white powder always comes with longish black and brown specks here and there? If they are indeed lice, any that I missed would have easily gone through the drinking spout and they also wouldn't have shown up on nuggets. Should there be specks in the powder? I'm rather concerned for the piggies, particularly as we are giving it them because of Bianca's ongoing soft and dodgy poops.