Hi! I found worms in one of my hens poo tonight. I just treats my flock with Corid for 3 days because I noticed on of my young pullets had a bit of bloody poo. Today one of my Americaunas pooed and it had long thin white wriggly worms in it. ( some alive- some not moving) Normal poo besides the worms. They have been on Rooster booster triple action wormer for about two weeks. Does this mean it's not working?! Help!