Keeping people properly informed is a laudable goal. That doesn't explain to me the dog-pile on of bashing that goes on whenever someone mentions using using pumpkin seeds. Why is it so difficult to believe that that there is substance in nature that can kill a worm? There are substances in nature that can kill an adult human.
I already posted 2 recent scientific studies that concluded pumpkins seeds do have anti-worming properties. Here are two more:
https://www.sciencedirect.com/science/article/pii/S2314853517303918. This one is from 2018 and concluded:
"In conclusion, the tested
plant extracts showed anthelmintic activity against
Ascaridia galli adult worms. The pumpkin seeds ethanolic extract was superior to pomegranate peel aqueous extract. Future studies are required to determine the
optimal dose and
administration route to maximize their effectiveness especially for pumpkin seeds as anthelmintic therapeutic."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5037735/ This one is from 2016 (using mice) and concludes:
"Pumpkin seed extracts may be used to control of Gastrointestinal (G.I.) nematode infections. This relatively inexpensive alternative to the currently available chemotherapeutic should be considered as a novel drug candidate in the nearest future."
It is true that more studies are needed. But,
The Chicken Whisperer's views notwithstanding, I don't think it is fair to characterize pumpkin seeds as some kind of hippy-dippy hogwash.
One of the studies I cited mentioned that their interest in pumpkin seeds was driven by the increasing resistance to commercial de-wormers that is developing. You want to talk about causing harm? Drug resistant worms are a serious problem, yet I rarely see this level of concern expressed when people post about how they are randomly dosing their chickens with various dewormers despite not knowing if their chickens actually have worms, or what kind.