My working defintion of "being fed" in the context of Christian community:
A place where one is engaged in the "renewing of one's mind" as described in Romans 12:1-2. In simple terms, I've found a place "where I'm fed" is where I can grow via the following, to name a few:
Christ-centered worship
Meaningful fellowship
Quality teaching (Sound doctrine, applicable to the listener's life)
Opportunities to serve others (Especially those outside the church)
What do you think? Comments? What would you add to that or take away from it?
-Steve

http://www.Colorado-Seasons.com