Glad the smell is improving!About 2 weeks in and their smell improved greatly. I just found out my original hen has tapeworms, so i guess everybody will be getting wormed at some point this summer
Did you get a fecal test or see the Tapeworm proglottids in the poop?
You will want to use Praziquantel to treat Tapeworms in poultry. If you are seeing them, then if they were mine, I would treat asap.