I will be dosing my entire flock tonight with piperazine dihydrochloride, how can I kill expelled worms in the run? I routinely give my flock UPACV, garlic, pumpkins and herbs to try to help control parasites. They also bath in wood ash and DE. However we have recently lost a couple hens who were lethargic and separating themselves for just a day or two and then died in their sleep. Egg production seems to be down and a few birds feel lighter. I understand that this medication basically just paralyses the worms which are then expelled. I would like to find out if there is something safe that I can use in the run to kill the worm eggs. Hopefully something that doesn't kill all the good bugs. This is the only wormer available here.