A 10-year-old Dobermann is treated for an aggressive bone tumour in its leg. One option is a full limb amputation, but another could potentially save Rolo's leg by cutting out the affected part of the bone and replacing it with a unique implant of Noel's own invention - a scapula-humeral endoprosthesis. Five-year-old labrador Jeff is suffering from developmental elbow disease, which cannot be managed by medication alone. The day of his planned surgery for a full elbow replacement arrives, though bad news places the prospect of such treatment in jeopardy and ferret Astrid, who's broken her leg falling off a sofa doing a 'war dance'.