This fact sheet features diet manipulation as a management practice to address odor and emissions coming from animal housing and manure storage systems. Reducing nutrients in manure can lead to reductions in emissions. Reducing nutrients in manure is broken into two main areas, nutrient input reduction and nutrient form modification. This fact sheet describes both methods.This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web page at: www.agronext.iastate.edu/ampat