I hope this is the right section- I didnt know wether to put it here on in the pest section. My birds have worms. I gave them Eprinex on saturday. It seems to be working because today I found a glob of paralyzed worms in a glob of chicken poop. Two questions - can I retreat the birds again this saturday?? its been raining every day since I treated them and I'm afraid of the stuff having washed off- especially on my ducks. - what can I use to treat the ground, coop, nest boxes etc. to help eliminate the worms even more?? Thanks for the help.