I've read in this forum that chickens can't get pinworms, but I swear it's what I see in their poo every so often. They look like angel-hair spaghetti, about 2-4 inches long (hard to tell..they are all bunched up in the poo). I don't know how to insert photos in the message. They are not dark in color, but a light cream color. They don't poop them out every day...sometime it goes for months before I see some, then maybe twice a month. It's totally random. I've treated everyone with Fenbendazole almost 2 weeks ago. The last mass of worms were seen about 2 days ago and were dead...but don't know if it's from the meds or because they were out of the host for a while. Do I treat again? Am I misdiagnosing? All girls act healthy.