He may be small but he is as mighty as his namesake. In fact, tiny Tyson is a strong competitor to be the smallest dog in Britain.
The Lhasa-chi puppy (a cross between a Lhasa Apso and Chihuahua) is one of a litter of five but is a quarter of the size of his siblings, measuring just five inches long and 4.5 inches from the floor to his shoulder. At nearly nine weeks old, he weighs just 303 grams.
When he was born his owner Rosemarie McLinden was worried the tiny pup wouldn’t survive.
She said: “He was born with a cleft palate so could not feed from his mum. We thought we would lose him but he fought on. I had to feed him with a tube to begin with, filled with puppy milk.
“He was like a newborn baby and we had to care for him throughout the night. We are now starting to wean him onto dog food and have to rub a little around his gums to help him.
“We called him Tyson because he is such a little fighter.”
Tyson is even smaller than his owner’s kittens and Mrs McLinden believes he may be the smallest dog in Britain.
Vet Sharon Crockett, of Pilgrim Veterinary Surgery in Boston, who treated Tyson said: “He could quite possibly be the smallest dog in the UK. He is so tiny, even for a part-Chihuahua.”
The McLinden family bred Tyson themselves through his Lhasa Apso mum Kizzy and his dad, a long-haired Chihuahua called Ozzy.
They are just part of the 40-strong household at their small holding in Keal Cotes, where other family members include a Bearded Dragon lizard, a hedgehog, horses, the kittens, chicken and two sheep.
The smallest dog in the world is a female Chihuahua called Miracle Milly who lives in Puerto Rico and measured 3.8 inches tall on February 21, 2013.
See the little guy in action in the video above.