If you are referring to Ivermectin, it will not treat large roundworms in poultry as I found out years ago. Benzimidazoles are very effective treating and eliminating worms.
I found it in their poop when I scoop it from the poop board. I clean daily so I see when they have it. My vet prescribed the IVM. Not sure what relevance the article has though.
the pdf the article links to, which was written by a vet, says that "Heterakis and Ascaridia are a couple of poultry worms that do exist in some backyard flocks. Proper husbandry/ management is important, as these two worms don’t cause a lot of problems, unless the parasite load is very high." If all you're doing is giving meds, effective or not, and they continue to live/range on the same ground, they will keep getting re-infected (the worm eggs live long in the environment, http://www.poultrydvm.com/condition/roundworms), so the treatment will be cyclical and never-ending.
Meanwhile; what are the worms doing inside the chickens innards? Having a party? Yep
so, we are agreed,Meanwhile; what are the worms doing inside the chickens innards? Having a party? Yep
Keep in mind that worms are feeding off the nutrients that are meant for the chickens to survive. They slowly starve a chicken to death and they are multiplying in the process. One female lays tens of thousands of eggs a day and are excreted onto and into the soil, contaminating the soil.
Chickens constantly peck and pick the soil, in doing so they pick up worm eggs and swallow them, starting the worms lifecycle all over again.
Worm eggs can survive up to 3- 5 years in the soil.
Worming on a regular basis and rotating forage areas will eliminate the wormload.
Birds that are penned, kept on the same soil requires frequent wormings.
It's the soil in the environment dictates how often birds need to be wormed.
The stocking density is also a factor.
