I get lots of vegetables from local market.they freeze in the winter,so to combat this I boil them outside and cool it down and feed it out.pigs love it.the book"harris on the pig"is where I first read about this.anyone else do this?
I've raised many pigs and they don't mind eating frozen food. The have incredibly strong jaws and teeth and would have no trouble eating even big chunks of frozen food. : )
I wouldn't spend time or resources heating it.