Fed Button

Celticpeasant

If you look through the forum, there is at least one thread on this. Also the walk through may have information as well.
http://forum.ea.com/eaforum/posts/list/10242405.page
Read in a thread that it happens after Jingle Bell Wreck part 9.

rsava2449

You have to complete Jingle Bell Wreck part 9 before you get the button in friend's towns. I've used it a few times, but got 1 present & cash for each fed so I think there could be a glitch. I would probably wait a few days until everyone gets to that point in the game to use it.