i have 3 adf in my tank, with a bristlenose pleco and two paradise gourami. the zen position is a total riot, i agree!! they like the company of other adf, i used to only have one, but when i got 2 more, they got a bit livelier and they like to zen-float together. i got around the feeding issue too. it's true, they the slowest things at finding food, even when i've dropped it right on their heads. what i do is make sure to feed the obviously hungry things first. then they relax and settle down because they're full. so after about ten minutes i feed the frogs, same location every time so that they know where to go (speeds their lazy bums up a bit). they get filled up and the other things that are usually a "food threat" are simply chilling out all ready full.
"If you can't change your fate, change your attitude." - Amy Tan