I have elm tree clippings in my chicken cages, the kind that is all shreaded up in little pieces.The other day i noticed an egg in the waterer.When I got it out it was soft.No big deal but I really hadnt seen a soft egg in a very long time.I was wondering if the elm tree clippings that they kick in the water had made the water more acid and dissolved the shell.Has anyone heard of anything like this happening?