1. A composition suitable for enhancing cognitive function in an animal comprising melatonin and one or more carotenoids in an amount effective for enhancing cognitive function in zhivotnogo.2. A composition according to claim 1, wherein the melatonin is synthetic melatoninom.3. A composition according to claim 1, wherein the carotenoids are ksantofillami.4. A composition according to claim 3, wherein the xanthophylls is selected from the group consisting of astaxanthin, lutein, zeaxanthin, neoxanthin, violaxanthin, α-cryptoxanthin and β-kriptoksantina.5. A composition according to claim 3, wherein the xanthophyll is astaksantinom.6. The composition according to claim 1, wherein the animal is a human or a domestic zhivotnym.7. The composition according to claim 6, wherein the animal is a dog or koshkoy.8. A composition according to claim 1, wherein the animal is an aging zhivotnym.9. A composition according to claim 1, wherein the animal is an animal susceptible to or suffering from a decline in cognitive function caused by aging or damage or boleznyu.10. The composition of claim 1 containing from about 0.001 to 100 mg / kg of melatonin and about 0.001 to 50 mg / kg of one or more karotinoidov.11. A composition according to claim 1, further comprising zinc in an amount effective for enhancing cognitive funktsii.12. A composition according to claim 11, comprising from about 0.1 to 400 mg / kg tsinka.13. A composition according to claim 1, further comprising one or more cognitive drugs in an amount effective for enhancing cognitive funktsii.14. A composition according to claim 13, wherein the cognitive drug is one or more of selegiline, nitserogolina, phosphatidylserine propentofilina, galantamine, vinpocetine, donepezil,1. Композиция, пригодная для усиления когнитивной функции у животного, содержащая мелатонин и один или более каротиноидов в количестве, эффективном для усиления когнитивной функции у животного.2. Композиция по п.1, в которой мелатонин является синтети
