In owning sub-adult and adult chameleons I've always found myself using large screened in enclosures, but lately I've been wondering about an open enclosure. Is there any real advantage or disadvantage to a well established open enclosure? Also, I've seen a few pictures of people feeding insects to their animals through the use of a cup. How hard is it to establish this type of eating habit? Also how would you present this new style of feeding to your chameleon?