ChookieG
Crowing
I will be doing a lot of reading on this subject. I don't have a worm problem with this flock yet but I know its only a matter of time before they show up. A good preventative would be an awesome start.
Just keep in mind that you won't be able to totally eliminate all the worms in your chooks. Worms are inherent in birds, it only gets problematic when the worm load is too high - usually because they are immunocompromised. When there are worms in their poo is usually a sign they'll need treatment. Best is to make sure your flock is always healthy by maintaining a proper lifestyle (involves usual stuff like a good diet, exercise, shelter, etc) and don't buy/select birds that are genetically weak/compromised.