I have noticed the past 2 or 3 days when I empty the water bowls, there are little bitty worms in the bottom, even under the ice, that look like wax worms. I have heavy plastic pet bowls, cannot for the life of me figure where these worms are coming from. I have pine litter for some and leaves in another pen. Then the other bowl is out on the ground for my free range girls. Could it be from back wash of their food? Or is it coming from my water supply (hope not cause its straight out of my kitchen sink!!) Its in the 30's here at night and the top of the water is frozen every morning. I clean their bowls with a scrub brush everyday, so I cant see where they can be coming from????