He said the slug exited his face below the jaw. It remains unclear how he was shot but Mr Harvey believed that because of the angle of the wound the boy "definitely" could not have caused the injury himself.
"There may have been a little bit of tomfoolery involved," he said. "I don't think it was a hunting accident."
Taupo Detective Senior Sergeant Todd Pearce said police had yesterday executed a search warrant on the family home at Wairakei, about 5km north of Taupo, where they recovered an air rifle and some pellets.
Lakes District Health Board spokeswoman Sue Wilkie said the boy was in a "comfortable" condition with family members at his bedside and would undergo further assessment before being released.