Identify the unclear pronoun references in the following paragraph. Where necessary, rewrite the sentences so that all pronoun references are clear: —

Robin hates people who are mean to animals. Last afternoon, as he was walking home from work, he saw some boys throwing stones at an old lame dog. Immediately, he rushed to help the animal. "Stop it!" he shouted as he ran towards the unruly boys, "Leave him alone!" Startled by the big man's shouts, they ran away. One of them jeered at him while running away. Robin, however, was totally unmoved by the jeering. He was happy that he could save it. Robin has always felt some affection for animals. Once he even went to the police station to complain against a neighbour who threw a cat out of the window. Instead of taking any action, they laughed at him and advised him not to worry about such 'petty' matters.