Beloved fluff monster Kylo, a 10-month-old rough collie, and golden retriever pup Sasha make return visits to the practice. Kylo's serious leg deformities are causing significant pain, while Sasha's deformed front left foot has left her without properly developed toes - and her struggles are increasing the more she grows. Professor Noel Fitzpatrick and his team need to find innovative solutions to resolve the problems both hounds present.

One-year-old golden retriever Bertie developed a dislocated hip joint and curvature of his spine and is in a lot of pain. Noel has to find an implant to treat Bertie's arthritis and prevent his hip from dislocating and work out a way to manage the effect of his spinal deformity over time. Trusty Tibetan terrier, nine-year-old Sunny recently received a total knee replacement using an implant system called a rotating hinge. However, before a second procedure is staged a flare up of the auto-immune inflammatory arthritis in Sunny's carpi casts a dark cloud over his future once again.