A spokesman for the California-based site said the error affected less than 1% of its users and they should be able to access accounts by updating their passwords.

The dogs, which originally muttbombed people in the local area of Dallas, Texas, have begun to go viral after popping up in selfies posted by Miley Cyrus, Ryan Gosling and other famous faces.

The best blogging makes a statement, but if that statement is negative in nature, the blogger could now be sued for defamation. Blogger law

The plugin, from San Francisco-based firm Streak, lets senders see when their emails were opened, who opened them, what device they used and their location.

U.S. company PetChatz has developed the novel device, which works with smartphones. They say the £210 piece of kit will assuage the guilt of leaving pets at home.