Researcher Chloe Barker, who analysed police files, is calling for intervention for children of methamphetamine users.
Grandmother One is in her early 60s. Two years ago police busted her 30-year-old daughter's house - charging her, her partner and members of his extended family with making P at the property. The couple's 1-year-old boy was home at the time.
Child Youth and Family (CYF) asked the father's sister to look after him but the parents were bailed and returned to the house with the baby.
Grandmother Two, also in her early-60s, discovered her 10-month-old grandson sitting in a box, surrounded by drug debris, beside his mother's passed-out boyfriend. The woman, an experienced social worker, notified CYF. "It was probably the hardest thing I have had to do. He was 13 months when I took him, and he went back when he was 3." By then the mother was clean, and her partner was convicted of making P.
Grandmother Three, in her 50s, is legal guardian to three of her daughter's children aged 6, 5 and 3. Two younger children live with their parents, whom she believes are still involved with P.
"Both parents are addicts," she said.
CYF said it didn't comment on cases.