I"ve heard and seen the tin water heaters..I cant make that..but what is this cinder block heater?? I already have mine on a half concrete block to raise it up higher but what do you put on the bottom..wouldnt the shavings catch fire?? I have a metal galvanized one from TSC you know the ones we all hate..the chickens love it and I cant afford to buy another. Does anyone have a picture of the concrete block heater? Also I heard there is a heated base that is sold at TSC?? not sure what that is but I want a cheap way to heat that waterer I already have that is inside without causing a fire. I cant use those heated dog bowls cause my chickens are freaks and would roost on the side, poop in there and fill it with wood shavings.