Warning after dog mauls boy, 7

POLICE are urging parents to supervise their children closely after a dog mauled a seven-year-old boy.

NSW Police Inspector Jeanette Jenkins said Saturday's attack was a reminder for mums and dads to be on guard when their children were interacting with dogs.

The boy was left with face and leg injuries after the attack by his uncle's bull mastiff-type dog at a Leppington house.

He spent yesterday recovering in Sydney Children's Hospital following surgery on the wounds that have been described as serious but not life-threatening.

"Around any animal, it's always best for the parents to be with the child and always monitor in case an incident like this occurs," Insp Jenkins told the ABC.

Camden Local Area Command police will liaise with the local council about the dog's future.