Two experiments were conducted to determine the individual protein fraction (IgG, low molecular weight peptides and albumin) contained in spray-dried plasma protein responsible for stimulating feed intake. In Exp. 1, pigs (21 d of age) fed a diet containing the IgG protein fraction had similar performance to pigs fed a plasma
protein diet. In Exp. 2, two fractions of
spray-dried porcine plasma, IgG and albumin,
were evaluated with pigs (10 d of age). Pigs fed either fraction had performance similar to pigs fed plasma protein.
