First off, they need to hire someone strong enough to lift the heavy 50lb or 100lb feed sack, and it really only needs changing if the dj's finish it or if they skunk it up with thier manure, and even then sometimes it's just left there till gone (cuz DJ's really toss that manure into everything and it doesn't take long to skunk it up).
But seriously, what types of feeds do you mean, they are normally obtained by Sat or ISDN or even phone hookup sometimes, and channeling it into the board is pretty much a non-issue.
Or am I not quite understanding the question.