Basset hound Barney is 'top dog' at home, enjoying salmon and venison as some of his favourite treats. But lately Barney's vertebrae have been causing him problems and Noel Fitzpatrick needs to perform high-risk surgery using 3D-printed implants. The professor also treats a giant mastiff called Tank, who is suffering from severe arthritis and needs radical surgery on both elbows, and a family puppy who has fractured his foot jumping off a bed. Now he requires specially developed surgical treatment