Hey! Yes I use it. I first became aware of the product for goats, from neighbors who also keep goats. As in my area the worms that riddle goats have become resistant to the usual goat dewormers. This is a common issue with goat keepers who keep goats on the same land for generations, eventually you get worms that you just can't get rid of. Which is why I use Molly's.
I also use her stuff for my chickens. I get my chickens and goats tested, goats more than the chickens obviously. Yearly for goats. They bounce around between being completely free of worms to having a very small load, depending on how strictly I kept to the formula for the year. Which is pretty amazing, if you keep goats! You have to feed formula 2 weekly and then formula 1 once a week every 6 weeks or so. I never had an issue with worms in my chickens, so I can't say they got rid of an outbreak in my chickens. I only use the formula 1 for them once every 8 weeks as a preventative. My friend had a huge worm overload in her chickens and I gave her some of formula 1, she had fecal tests done before and after. It got rid of them completely. She had a roundworm infestation. But this isn't surprising as the main ingredient in Molly's is wormwood, there are many studies that show the effectiveness of wormwood for intestinal worms.
Here are some studies that talk about the use of wormwood for poultry
Coccidiosis.
https://actavetscand.biomedcentral.com/articles/10.1186/1751-0147-56-22
https://pubmed.ncbi.nlm.nih.gov/28766151/
There are other studies that talk about the use of wormwood for other intestinal parasites as well. But they are all from studies looking at humans/other animals. I like to stay on poultry if I can when I look at that stuff.
I would love to replicate my friends results someday, maybe by getting some rough looking craigslist chickens.