“Stand­ing at less than “3” inch­es tall and weigh­ing no more than the aver­age mobile phone, this chi­huahua pup­py could soon qual­i­fy as the world’s small­est dog. Three-month-old Mil­ly has bare­ly grown since her birth and can perch in the palm of a hand. Now her own­ers believe that her tiny frame could make her a Guin­ness world cham­pi­on. Mil­ly, from Puer­to Rico, weighs a puny 0.37lbs.

Three-month-old Mil­ly has bare­ly grown since her birth and can perch in the palm of a hand.

Now her own­ers believe that her tiny frame could make her a Guin­ness world cham­pi­on.

Mil­ly, from Puer­to Rico, is 6.53cm high – about 3.5cm short­er than the record hold­er – and weighs a puny 170g (0.37lb).

Being small may look cute but it brings plen­ty of prob­lems. Mil­ly had to be hand reared because her minus­cule size meant she was unable to feed nor­mal­ly.

‘She could not breast­feed due to the tiny size of her mouth,’ said her car­er, Rivera Eizzil. ‘To get an idea of just how petite she is, when she was born she received milk from an eye­drop­per.’

She still needs con­stant care from Ms Eizzil and her breed­er own­er Vanes­sa Sem­ler.

They are both hop­ing she will take the small­est dog crown from anoth­er chi­huahua in Ken­tucky, US, called Boo Boo, who is 10.16cm (4in) tall.

Guin­ness World Records rep­re­sen­ta­tives say they will be hap­py to see if Mil­ly mea­sures up – but she’ll have to avoid growth spurts for the next nine months. To qual­i­fy, a dog must be one year old.

Milly is after a place in the world record books (Picture: Rex)

Mil­ly is after a place in the world record books (Pic­ture: Rex)