A controversial Korean laboratory has successfully cloned the world’s smallest living dog 49 times for a commercial breeder.

‘Miracle Milly,’ a six-year-old chihuahua who lives with her owner in Florida, weighed less than an ounce and could fit in a teaspoon when she was born.

The tiny pet, who entered the record books in 2013 and weighs just over a pound, is the smallest dog living in terms of height, standing at just 3.8in (9.65cm) tall.

She was cloned at the Sooam Biotech Research Foundation in Seoul, South Korea, in August last year.

The company, which reportedly charges $100,000 (£75,000) to bring a pet back to life, has cloned hundreds of pets.