Our company has developed a heated livestock water heater using propane gas. You may check it out at
http://www.horsingaroundagain.com/. We have a variety of sizes. You can get an idea of cost on ebay at
http://www.ebay.com/itm/140912576183?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649 or you may email me at
stu@millstreammarketing.com. Not trying to "push" our products, but it is a very workable solution.
