There's a joint party at the palace for Prince Louis' first birthday and to welcome Baby Sussex into the fold. And the Royal Pup Pack: Lupo, Guy, Oz and Jack are in a regal tizzy. What do they get for the tots? Bones? Flea collars? Fur brushes? A chance encounter with a stray dog spurs the pups into inviting a host of hungry, homeless hounds to the celebrations. Will that be the perfect present or the recipe for a royal pawtastrophe?