The global pet food industry is predicted to be worth nearly $100bn by 2022. Premium pet food has become big business. Sheila Dillon asks whether we've gone too far in pampering our pooches with expensive treats. We hear from Kevin Glynn and David Nolan, co-founders of food delivery service, Butternut Box. Butcher John Mettrick tells us about the raw pet food he makes for dogs and we peruse the menu at a high-end brunch for canines at M Restaurant in London.

(Photo: Three dogs behind a birthday cake surrounded by balloons. Credit: Getty images)