The invention provides methods for using fatty acid alkanolamides for ameliorating one or more symptoms or conditions caused by stress, e.g., loss of appetite, or for maintaining and enhancing nutrient and caloric intake by an animal under stress or that has experienced stress. Generally, the fatty acid alkanolamides in amounts of from about 0.1 to about 1500 mg/kg/day before, during or after stress, preferably on a regular or daily basis as a component of a food composition or as a dietary supplement.