The woman claimed she had found the joey abandoned the day before and was looking after it.
Officers took the Joey back to the station and called the RPSCA Ambulance to come get the baby, who is protected under the Nature Conservation Act.
‘He’s been on fluids but is doing well and will shortly be going out to a carer,’ said RSPCA Qld spokesperson Michael Beatty.
The RSPCA is urging people who find lost and injured animals not to attempt handling them.
‘Please call our animal emergency hotline on 1300 ANIMAL. Often the animal may have no obvious signs of injury but it can have internal injuries that need immediate attention.’