The addition of ‘high quality’ complementary feedingstuffs to the diet of the post weaning pig can positively impact on growth and lean muscle deposition. The Maillard Reaction bonds amino acid and sugar molecules together, and is one of the major pathways in the chemical changes that occur in the cooking process. Cooking of feedingstuffs has been shown to improve the digestibility and nutritive value of a diet (Pickford et al, 1992). In this study, lysine (Lys), methionine (Met) and threonine (Thr) where chemically reacted with sugar molecules to give in vitro early Maillard Reaction Products (MRP). The aim of this study was to assess what effect the addition of a solution of these MRPs to a complementary feedingstuff (Matan XL) would have on overall diet digestibility and subsequent piglet performance.