It depends on species
I think most LTA BTA carpets should be fed
I spot feed my LTA once a week
piece of frozen shrimp clam or silverside thawed in tank water
nomore than 1/4 inch or it might regurgitate it,
http://www.wetwebmedia.com/ltafaqs.htm
he also usually gets some left over mini mysis twice daily from my fish feedings
cleaner shrimp will try and steal its food too.
will deflate reinflate usually after feeding.