'Our dogs are in the midst of an epidemic. It’s not an epidemic of viral disease, but of chronic ill health. They’re besieged with itchy, pus-laden, scabby skin; vomit and diarrhoea are the norm. One in every hundred dogs suffers from epilepsy, and an even higher number lives with painful arthritis. Allergies are also reaching epidemic proportions: dogs are becoming allergic to life.'