The venerable letterbox of the Daily Telegraph is host to a wealth of animal owners and observers. Not to be outdone on any subject, comes a menagerie of musings on a topic very close to their hearts. A collection including correspondence from dogs, notes about peacocks, admonitions on horse owners and scapegoats for cats. With the great and the good of the furry and feathered featured, this is the Telegraph letter-writer's pet subject.