Sadly, those websites, posts, and FB pages are spreading misinformation when they post about the pea-sized amount.As far as the pea size for Panacur for worms, I saw that dosage amount on another chicken site on FB and so that's what I gave all my chickens as a precaution. I don't know if they have worms or not.

I single too small a dose could cause resistance, so it's always best to know what worms they are. Once you know what they are you and your vet can come up with a treatment plan.