She was hit in the chest and legs by a single shot from a gun shortly before 1pm on Saturday in Te Aroha.
Two men were due to face firearms charges yesterday in relation to the incident.
Detective Senior Sergeant Graham Pitkethley said a 16-year-old man and a 21-year-old man had been arrested and would be appearing in court yesterday in relation to the shooting.
"The 16-year-old youth faces wounding with reckless disregard and unlawful possession of ammunition charges in the Hamilton Youth Court, and the 21-year-old a charge of unlawful possession of pistol in the Hamilton District Court.
"Early indications are that the shooting may have been accidental."