Robert Galbraith said this quote

One of the earliest and most vivid memories of Robin’s childhood was of the day that the family dog had been put down. She herself had been too young to understand what her father was saying; she took the continuing existence of Bruno, her oldest brother’s beloved Labrador, for granted. Confused by her parents’ solemnity, she had turned to Stephen for a clue as to how to react, and all security had crumbled, for she had seen, for the first time in her short life, happiness and comfort drain out of his small and merry face, and his lips whiten as his mouth fell open. She had heard oblivion howling in the silence that preceded his awful scream of anguish, and then she had cried, inconsolably, not for Bruno, but for the terrifying grief of her brother.