From the case of the killer worms to budgies with itchy beaks, Pete Wedderburn documents some of the most memorable mysteries from his many years in veterinary practice and as vet-in-residence answering readers’ questions at the Telegraph. Among his patients are a ginger cat with a bad cough, a Newfoundland who wouldn’t budge, and a parrot who refused to talk; and after each case of veterinary detection, there are owners’ questions and answers about similar problems.