The creatures hardly feel warm, until they come out of their dens in search of water and food, in order to build their bodies, the organisms need thermal energy that they derive from the sun and nutrition.

Animals feed their young to continue life, so stopping drinking and feeding means stopping the body from life...means death

Death is a mystery that only nature can comprehend. It is a demise for those who cannot cope with life, and the annihilation of those who are depressed by hunger and find no way to food.