Dr. Chris pays a visit to birthday girl Zambi, a big, boisterous lion cub who’s turning one. Dr. Lisa must attend to a cat that has swallowed a ribbon from a birthday present. She urgently needs to locate the ribbon and get it out, or her patient will have to undergo surgery. Finally, Dr. Chris must help get a cranky koala down from a tree. Part of the "Dr. Chris Pet Vet" series.