The Ulverstone boy was visiting a family friend's house in West Ulverstone on Thursday and was playing with the dog when he was attacked.
His step-father Ethen Prem was in the backyard working on a car with his friend at the time.
"Next thing I turned back and he was getting attacked," Mr Prem said.
"My mate ran over to the dog and pulled him clean off."
Monti was taken by ambulance to the North- West Regional Hospital in a satisfactory condition.
He had an operation to repair a severe wound on his upper left arm, which had been opened up to the muscle, a 6-8cm gash on the back of head, a 5cm gash on his forehead and smaller wounds above his eye and to his left index finger.
Mr Prem said Monti was a bit shaken by the experience but in good spirits.
No more surgery is required and he is expected to be released tomorrow.
Sergeant Kym Turale, of Ulverstone police, said no offences had been committed.
Bull terriers are bred for fighting but are not to be confused with the more notorious pit bulls, and are not considered a restricted dog breed.
The Central Coast Council has the authority, under the Dog Control Act 2000, to decide what will happen to the dog.
In this case the juvenile bull terrier, which was about two years old, was declared a dangerous dog by the council.
The owner had the option to meet extra obligations that come with keeping a dangerous dog, such as the construction of a child- proof enclosure to house the dog, as well as special leads and signage.
The owner elected not to and the dog was destroyed.
(The Advocate - April 16, 2012)
