Louise helps a family deal with their new hell-raising chihuahua Chloe. A ski patroler adopts Jura, a border collie. A retired couple deals with their hyperactive pup Pedro. A housewife deals with her stubborn golden retriever, Lola.

Every year, we welcome a quarter of a million puppies into our homes and in this series we follow ten of them. We explore how the nation's favourite pet develops, learns and adapts to their new world, but also the profound effects they can have on the lives of their owners, capturing both the mayhem and delight a new puppy brings, from toilet training and first walks to sleepless nights and getting used to their new owners. On hand to offer our families expert advice is dog behaviourist Louise Glazebrook. In this episode, we meet 32-year-old telephone psychic Delia as she goes in search of a big breed dog to live with her in her two-bedroom London flat. Louise arranges for her to try before she buys with a visit from great dane Hank and leonberger Nelson. Cocker spaniel Poppy joins the Vaughan family in leafy Surrey. Poppy gets the undivided attention of the children, but three-year-old Isadora is a bit too eager to play when Poppy wants to rest. When Poppy bites back, Louise arrives to offer advice on puppies and young children. We return to the Scottish Highlands as border collie Jura faces an assessment in her bid to become an avalanche search and rescue dog. And we drop in on golden retriever Lola as she battles it out with owner Claire. Lola is stubbornly refusing to walk without being fed sausages. Will a visit from Louise see a truce be called?

Emma Lowe goes in search of a special puppy, wanting one that will act as a therapy dog for her four-year-old son, who has Down's syndrome, and soothe him when he is distressed. Meanwhile, newlyweds Leigh and Bella are forced to call in behaviourist Louise Glazebrook when their new pug Butch Cassidy has trouble sleeping on a night. There are also catch-ups with salon owner Hannah, who is taking on her third Chihuahua, and psychic Delia as she welcomes the big-breed Leonberger she fell in love with. But as the small puppy grows, she finds herself completely out of her depth.

In this episode, we meet our final puppies. First-time homeowners Alex and Pete welcome rescue pup Pippa, who comes with an extreme chewing habit, while the Woolf family bring home cockapoo Rosso as a playmate for eight-year-old son Rio. The first thing they have to contend with is toilet training. We catch up with Emma Lowe, who is training young labrador Hunter to act as a therapy dog for her son Alfie, who has Down's syndrome and autism. Can Hunter show signs that he can react to Alfie's moods and act independently of her, providing him the comfort Emma so desperately wants? And the battle between professional psychic Delia and her giant breed leonberger pup Shiva reaches crunch point, when Shiva begins to bite and scratch. Can Louise help Delia and her companion have a happy home together? We also catch up with all our ten families and their puppies at the end of their first six months together to discover if, in the end, puppy ownership has all been worth it.