I would like to put out the idea that just because something is occurring naturally, doesn't make it the best way by default (I'm not saying this in a passive-aggressive way mind you!). I just feel like its our responsibility as pet owners to examine all aspects of our care for our pets for ways to improve on it rather than just doing things out of convention. Consider the first person to suggest an all rat diet. I'm sure there was opposition, "Snakes don't eat just one thing in the wild. They won't get proper nutrition that way." or the person who first implemented UTH, "Basking lights are the most natural replication of the sun. Heat doesn't just radiate from underground in their habitats".