Pretty much just what title says. Should be a moveable wooden trough that we can fill with food (and/or water). Then it should have like a XX-tile radius where livestock can eat out of it. Maybe also as part of a fence? So that you can fill it from outside by activating a special fence, a trough fence tile. (Pretty much just a fence tile that blocks movement, has the trough functions, and inventory accessable from any side.)