In our barn we have an automatic water thing but it doesn't use electricity. We have one that when the horse puts it's nose inside it opens something up that let's water out.
this is the most disgusting video I have ever seen on you tube. if this is the only sales these knuckle draggers can think of using they should not be advertising or selling this absolutely useless product.
if a GFI receptacle is used to plug into electric heaters they are safe. A GFI will disconnect power in 1/100 of a second, if there is a short.