You don't want to mess with worms. You want in one shot something that does the job because worms are hardy and prolific, they carry diseases, they suck out the nutrients and destroy organs. Consider them contageous. They are probably responsible for killing more chickens than anything else.
So what would you recommend thats natural. I recently used a chemical to get rid of the worms, but then realized I won't be able to eat the eggs for 14 days.