IVY the kangaroo and her keeper Raine Eagleton share a very special kind of mateship.
At five months old, Ivy fell from her mother's pouch inside the kangaroo enclosure at the Auburn Botanic Gardens and Fauna Reserve.
Ms Eagleton found the one-and-a-half kilogram eastern grey kangaroo joey calling for her mum.
Ivy's mother wasn't responding to the calls, so Ms Eagleton stepped in and decided to hand raise the young joey.
Ms Eagleton, who has been raising kangaroo joeys since the age of 12, said there were a number of reasons why Ivy was abandoned.
"If they are scared they [kangaroo] will throw them," she said.
"In the wild they will sacrifice their baby to save themselves. I think in her case it was her mum being inexperienced."
Ms Eagleton took Ivy to and from work in a specially made pouch for more than 11 months.
The joey also needed 24-hour round the clock care.
"When I first got her she would have been on four-hourly feeds and then it decreased when she got older," she said.
"Everyone said it was practise for a real baby."
Apart from raising the joey, Ms Eagleton and Ivy share the same name.
"My mum named her after me and Ivy was my middle name," Ms Eagleton said.
Ivy is now 18 months old and will soon be reunited with the reserve's other kangaroos when she is moved back into the kangaroo enclosure.
Until that time, Ivy still has a lot more growing to do.
Eastern grey female kangaroos can stand anywhere from 80 to 180 centimetres and can weigh over 30 kilograms.