Some animals can have a meal and not eat for a very long time.
Most snakes have ther meals in the summer and go to sleep in the winter and sleep for months.

Bears eat food and store it in their fat for energy. Then when it is winter they had to go to sleep and have a period of rest.

Camels cary fat in their hump for energy because there is no food in the deset. They need heaps of energy for heaps of walking and it is very hot.