This is an excellent product with so many uses other than just a dewormer.To save even more-please note on this package the main ingredient: Diatomaceous Earth, Food Grade. No parisites: internally or externally.I use this product for aid in fly control. This product can be also used on dogs, cats, small rodent pets, sheep, goats, cattle, rabbits, horse, and yes even been known to help humans. Google it!!!
I use this product for my chickens and I have never had a parsite problem. I have even confirmed this with multiple fecal tests. In addition, my birds look more bright eyed, energetic, and their feathers are the most beautiful I have seen. I reccomend this product very highly.