Effectiveness of Early Supplementation of a Processed Soy Protein Product and Route of Application for Broiler Chickens

SUMMARY The effect of early supplementation of a processed soy protein product (PSP) and its route of application for broiler chickens was studied. A total of 252 day-old male Ross 308 chicks were randomly placed on 4 treatments as: (1) control diet; (2) control diet + PSP paste (PSP1); (3) diet with 100 g PSP/kg only (PSP2); and (4) diet with 100 g PSP/kg + PSP paste (PSP3). The PSP paste was withdrawn after 5 d, while the starter diets with or without PSP were provided until day 10. Each treatment was replicated 7 times, with 9 birds per replicate. On 10 d, birds on 100 g PSP/kg plus PSP paste consumed the lowest feed, while body weight gain (BWG) and feed conversion ratio (FCR) were not affected by the treatments. On day 35, birds on control diet had significantly (P