Euphemism: "When they walk on, the dog comes too, darting head on the path, looping back, diving between them, begging for sticks to be selected, tossed, re-thrown. It thrusts itself past their ankles as they continue to talk, it plunges in and out of the undergrowth, it gazes up at them" - euphemism for their love for each other. Energetic, yet unpredictable.
Metaphor: - "thinking only to protect this animal, who has appeared from nowhere, who approaches the world and all it has to offer with such trust" The safety of the dog was worth protecting at the price of her skull.
Colloquial language, listing of euphemisms for death: "that would have been it. Curtains. Kick the bucket. Carked it. End of the line. Lights out. Bitten the dust. Gone the way of all flesh. Given up the ghost." - light-hearted and flippant.
Language of anatomy: "to the muscle and bone nearest his heart" she has thought over the situation many times, and has an understanding of the anatomy.
Nature language: "They walk on along the road and back into the forest where the light is patched and green, where the path is winding, diverging, not always clear. The dog comes too." - the language of nature here is more negative following the event, it's shifted and has focused more on the danger.