What are Elsa and Frank’s animals?

'I wish we could sleep here,' she said. 'So do I.' 'In the open air. Like animals.' 'If we were animals, you'd be one of those pale gold horses with a white mane.''A Palomino. What would you be?' 'A fox, following a Palomino.' She stared at him for a moment, then broke into a laugh. Frank didn't laugh. It was true. He would have liked to sniff his nose up and down her gleaming skin.