The wolf has no problem running forever. For once he's not running away from or toward anything. He's just running to run and in his forever dream there will never be an end to the meadow or a place that forces them to stop. The woman at his side is happy, really happy, and so - so is he. They can run as long as they want and even the melting ice in his mouth is a sweet taste. This isn't about obligation. It's about freedom. And he thinks that neither of them have as much of that as they think. Here, at least, they can steal it for themselves.