I opted to try the holistic/non-chemical way first and do fecal testing after a week to see if was working, particularly since I have baby chicks who have already started integrating with the flock. So I’m using three things: diatomaceous in their food, an herbal dewormer blend in their food...
I had a hen poop out worms once (posted about it the other day) - I started treating the whole flock and today we saw this in several fecal samples. Coincidence? Or eggs/dead worm pieces?