My chickens wouldn't go into the box of water that I put in for them. (Under the bed box, idea from BYCer). So I filled it with chip and sand, and then with water, and put a frozen water bottle in to keep it all cool. They have had a ball with it, and kicked out a lot of the chip (now the water doesn't seem so scary....) but it makes me nervous how much they sip the muddy water. I better take it out and redo the whole mess soon. Anyone have any problems with chickens making themselves sick on muddy water?