In accordance with the disclosed subject matter, an automatic feeder comprising a feed bin for storing bulk material, a trough for dispensing the feed to livestock, and a vein assembly positioned horizontally between the feed bin and the trough for transferring the bulk feed from the feed bin to the trough is provided. The vein assembly comprises a vein tube that houses a rotatable vein shaft and flexible wipers affixed as spokes to the shaft that form vein compartments for the feed. A motor assembly with a programmable timer rotates the vein shaft within the vein tube thereby transferring feed from the feed bin, to the vein compartments, and then to the trough.