Bullying A Tiger

This was getting obvious for their fans, though it was a disappointment they believed that the tiger hit Timur to eventually have his lunch while the truth was opposite as explained by the head of the park, Dmitry Mezentsev, “Timur went beyond all limits. He pushed Amur away from their hill with his horns; he butted him with his horns and kicked him with his legs.” But what made Amur react so aggressively towards his bestie?