Snowball

A little leopard named Snezhok lived in a cozy enclosure with his family - mom, dad and two younger brothers. Every day they played, ran on the grass and learned to hunt the animals that the staff brought to their enclosure. Snezhok was the most curious and brave among the brothers, he liked to explore every corner of his home.
One morning, the zoo staff brought another little leopard cub into the enclosure. He was the same age as Snezhok, and he looked just as curious and playful. The staff told each other that he had been found in the mountains, where he had been left without parents, and now he needed a new home and family.
At first, Snowball was a little wary, because it was a stranger.
Actions of the new fighter?