Hi all. We have got 3 small bantams and 2 micro pigs in our back yard farm. With the wether taking a turn for the worse and their water freezing what are your best homemade ideas to stop the water freezing over night? Apart from taking the water out what are you guys doing? Got a 210lt bin full of water with a few tennis balls and that seems to work but the pigs would take them out and play with them.