1. A composition comprising one or more fatty acid alkanolamides in an amount effective to alleviate one or more symptoms or conditions in an animal caused by stress, or effective to support and enhance the intake of nutrients and calories in animals during stress or undergoing stress, and one or several stress control agents. 2. A composition according to claim 1, wherein the fatty acid alkanolamides comprise from about 1 to 80% of the composition. The composition of claim 1, further comprising at least one of: (1) one or more probiotics； (2) one or more inactivated probiotics； (3) one or more components of inactivated probiotics that stimulate beneficial effects similar or the same as for probiotics； (4) one or more prebiotics； or (5) combinations thereof. 4. The composition of claim 1, wherein the fatty acid alkanolamide is fatty acid ethanolamide. The composition of claim 1, wherein the fatty acid alkanolamide is (Z) - (R) -9-octadecenamide, N- (2-hydroxyethyl, 1-methyl) .6. The composition of claim 1, wherein the fatty acid alkanolamide is a hydrolysis resistant analogue of the fatty acid alkanolamide. A composition according to claim 1, containing fatty acid alkanolamides in an amount sufficient to apply the fatty acid alkanolamides in an animal in amounts of from about 0.1 to 1500 mg / kg / day. The composition of claim 1, which is a food composition. The composition of claim 8, wherein the food composition is a pet food composition. A composition according to claim 8, containing an amount of fatty acid alkanolamides sufficient to use fat alkanolamides1. Композиция, содержащая один или несколько алканоламидов жирных кислот в количестве, эффективном для облегчения одного или нескольких симптомов или состояний у животного, вызванных стрессом, или эффективном для поддержки и усиления потребления нутриентов и калорий животным во время стресса или перенесшего стресс, и один или несколько агентов для контроля стресса.2. Композиция по п. 1, в которой алканоламиды жи
