The children haven’t just been passing time in this magical world around them. They have been holding it in their hands and working with it every day.
We are in an urban forest and wildlife is not hard to find, but the wildlife we see is in perpetual danger from humans. Especially this vixen and here she was now, dead. She had been poisoned. She would have been more effective in killing the rats and mice the poison was intended for if she had been allowed to live.