Oatfeed is a by-product (usually of Porrige products) obtained during the processing of screened, dehusked oats into oat groats and flour. It consists principally of oat bran and some endosperm.
It is usually a small (~5mm) pellet used as an animal feed and has a low nutritive (Prot:5%) and energy value (6mj/kgDM) but is quite palatable and high in fibre.
Sometimes called "Breakfast Bran" or "Oat Middlings"
SOURCE: "The Feeds Directory (Commodity Products)" by Dr. W.N. Ewing