I treated all my chickens (or so I thought - 3 look so much alike I can't tell the difference and 1 might have gotten a double dose and another no dose) back at the end of Nov with Valbazen, followed by Eprinex pour on 2 weeks later. A week ago I saw some worms in 1 chicken's poop. Based on where it was, I concluded that it could be only 1 of 4 chickens (the 3 look a likes, and 1 other). I treated the 4 with Eprinex last week, because they are starting to lay eggs again and don't want to throw the eggs away again. This morning, another poop with worms. I am planning to treat the other 8 with Eprinex and then get the 4 originally treated again. Has anyone had any experience with Eprinex pour on? My understanding is that it's a broad-spectrum wormer, so it should take care of these? Thanks for any info you can give me.