A well-rested cow produces more milk

And what gives better rest: sleeping on a straw bed, or a waterbed? Apparently, Saskatchewan farmer Mel Foth has found that indeed, a waterbed is preferred not only by people, but by his cows! Moo-cows spend half their day lying down, and getting to rest on a waterbed prevents them from getting "bed" sores, and helps them rest better - thereby making more (and I would guess, better tasting) milk! A happy cow is a productive cow! And one really productive cow takes up less resources than 5 low-production ones, which is good for the environment.

And the stalls are easier to clean, too!

Read more on the CBC.