Silverback dad defends & protects daughter

Afia the Western Lowland Gorilla is on top of the climbing frame, while her half sister Ayana is playing with a log and running after dad. Suddenly Afia comes rolling in. She continues to roll and play in front of Jock the Silverback. Ayana and Afia have a little tussle when dad just quickly moves his hand towards them. Ayana then tries to climb on her big sisters back when suddenly another female Gorilla came running in and wanting to get involved. Dad Jock was having none of it and pushed her away. The staff did tell me Jock was a very good dad,always looking out for the two girls.