if they ingest it wen wet it will move through the gi and kill worms that is proven they use it on children in africa look it up online i have used on my chickens for years and no worm problems
they look fine a lot of chickens change poops because of stress and separation but a loose watery poop can mean worms a de bath can never hurt. try putting a little de in their water that is safe and will worm them as well