Fenbendazole or SafeGuard is not water soluble, so it will settle out in the water. The Poultry DVM link is quoting a chicken expert, but it is not water soluble. Poultry DVM is a website, and no one seems to know who they are. They have made a number of errors in some of their info, although some links are fairly good. As in any info online, check more than one source. The insolubility is why most give it individually. There is a newer one—SafeGuard Aquasol—that can be mixed in water, but is very expensive and dosage is very confusing, at least to me.
14 days is fairly common for egg residue in most wormers. Valbazen mentioed earlier, is albendazole, one that is also used to treat worms in humans, so it is considered safe.
14 days is fairly common for egg residue in most wormers. Valbazen mentioed earlier, is albendazole, one that is also used to treat worms in humans, so it is considered safe.