Development of Models to Describe the Weekly Response of Ractopamine, When Constant or Variable Dietary Levels of Paylean are Fed

Purdue University 2001 Swine Research Report. Most previous trials have evaluated the response of Paylean (ractopamine) when constant levels of 4.5 to 18 g/ton were fed for the last 90 lbs of live weight gain. Recently, a trial was conducted to determine whether the response to Paylean could be enhanced or maintained if fed at increasing or decreasing levels compared to pigs fed a similar constant level throughout the finishing stage (Herr et al., 2001).