Would you borrow someone else's dog?

Would you lend your dog to someone for the day rather than keeping them locked inside while you're away from home, or take care of someone else's for free? Pauline McCole speaks to Rikke Rosenlund of Borrow My Doggy and 'borrower' Alice Lister about a service that aims to match time-starved owners with dog-lovers who lack a pet of their own.