Nineteen million households in Britain have a pet; six million dogs, almost as many cats, and then a veritable Noah's Ark of others: budgerigars, terrapins, gerbils. hamsters, slow, worms, goldfish, etc. Clive Jacobs asks how we should relate to our pets. Do they help us to be more human, or can they take a place in our lives that ought to be occupied by the love and companionship of other people? Written and researched by Peter Taylor Producer DAVID WlNT ¡.;R long wave only