Experience in the zoo

What a rare moment we have in the zoo last Sunday.
We arrived pretty late, half an hour before closing time. Our main agenda was just strolling around then when we passed rhino, one of the zoo guards called its name "Shoba" and it came forward closer to the fence
Then the guard asked if anyone want to feed rhino with melon, everyone was reluctant and Richmond bravely stepped forward and feed the rhino.

What amazed us was Rhino recognized its own name when the guard called him and it obeyed to the guard not anyone else even we called its name and when rhino ate, he had no teeth at all