Sai Mai and piglets
This one is a very interesting story that many people could not believe happened in the first place. There once was a baby tiger named Sai Mai that had no mother or father and was actually raised by a pig when it was very young. Years later, that pig would, unfortunately, pass away after the tiger grew up.
Some time passed at this zoo and another pig died after giving birth to some piglets. These piglets were then introduced to that same tiger who instantly made a connection with them and began to raise them like a mother. Who thought a tiger could adopt a group of piglets?