What is happiness?

A few years ago I went to Kruger National park with my family. As we were driving down a side road we came across a pride of lions who had killed a hippopotamus and were eating it. There were a couple of very young cubs who were frolicking on the road while their mothers ate, but there was an older cub who was eating alongside the adults. The hide and meat of the hippo was too tough. Some of the adults were also having a hard time in tearing and eating but this young cub had it hardest. His fur was drenched in sweat as he tried to tear the tough hide and chew the tough meat.