Please help me - I feel like a failure - lethargic, diarrhea, and weight loss

[Wyorp Rock]

There is absolutely no way for me to know which chicken that came from, we free range. So yes, I will treat the whole flock.
Do I just need to do the chickens or do I also need to do the ducks and turkeys?
Can I use Valvazen? The post recommends it for a large flock, we have over 100 birds total.

You need the Equimax or one of the products listed in the link below that contain Praziquantel. The thread @dawg53 linked for you was to instruct on how to give oral medications (Title of thread is "My Flock Has Roundworms). Valbazen is used to treat roundworms and other worms that poultry can have, but it's not effective against Tapeworms - you need Praziquantel.


https://www.backyardchickens.com/threads/treating-tapeworms-under-construction.1220309/