What is your wormer of choice and how is it administered? With 38+ birds here, it is not unreasonable for us to individually dose our birds.Do let us know when you get to the lab and see what they find .
I don't have an answer on the FF .
I individually worm my chickens so as to know for sure what's going on .
I know Ivomec has it's place and has some who swear by it BUT ivomec does not mix with water (so it's a crap shoot when doing it that way and we always lose in a crap shoot /. Some say there is a type that does mix with water . Also Ivomec is proven will NOT do all it's touted to doing . As i said Ivomec has it's place and purpose . I don't use it at all with chickens because we have stuff that we can use that will work without a guessing game .