Pretty sure my chickens have worms. Probably threadworms since I don't see them in the droppings and I know they're difficult to kill, but I haven't had a fecal float done so I don't know exactly what kind. I have Fenbendazole paste. How much do I give them? I have large fowl as well as bantams, so I need a dosage for both. Don't really have time to do a fecal float since they are sick and I would like to give it to them today. Thanks!