A Rottweiler which mauled its owners' 13-month-old grandson to death had been kept in a yard and not walked for five months, an inquest has heard.
Archie-Lee Hirst was attacked by the dog at his grandparents' home in Wakefield on 28 December.
Recording a verdict of accidental death coroner David Hinchliff called for "stricter controls" on the breeding and sale of dangerous dogs.
Wakefield Coroner's Court heard Archie-Lee died from multiple injuries.
His aunt, 16, who was babysitting the youngster and her two younger sisters aged six and seven, tried to fight off the dog.
The seven-year-old had been carrying Archie-Lee when the dog snatched him out of her hands.
The two-and-a-half-year-old female Rottweiler was later killed by police.
Mike Mullen, a canine consultant, said the Rottweiler did not have enough "mental stimulation" in the back yard where she was kept.
Mr Mullen believed the animal would have viewed Archie-Lee as an object being given to his seven-year-old aunt.
Mr Hinchliff told the court that no blame should be placed on Archie-Lee's aunt, who did all she could.
"Once the dog had the child, she was not going to give up what she regarded as her prize," he said.
"Whatever efforts there might have been to retrieve Archie would have been in vain."
http://news.bbc.co.uk/1/hi/england/bradford/7576074.stm