The little girl was discovered yesterday afternoon by the German shepherd, which heard her crying in nearby bushes and refused to leave her side until owner Mr Wilday came to investigate.
'If it wasn't for Jade that baby could have been dead.'
'Jade has grown up with children around her, she loves babies and when she found the baby in the bushes she wouldn't leave until she knew I had seen it,' the retired engineer said.
'She is a hero dog. There was no one else in the park at the time and it was very cold. If it wasn't for Jade that baby could have been dead.'
Baby Jade is thought to be a day or two old, and still had the umbilical cord attached to her when she was found.
She weighs around 6lbs, and is currently being cared for at Birmingham Heartlands Hospital, where police say she is "alert, happy and contented".
West Midlands Police are keen to track the mother, and have released an instagram video in the hopes of her Jade being recognised.
Ch Insp Ian Green said: "Paediatricians have confirmed the baby was lucky to be found when she was, as even just a few more hours exposed to the elements could have had fatal consequences.
'She's very alert and a contented happy baby.’
‘Thankfully, we now know she's safe and well - and our priority is very much on finding her mum to ensure her safety and to provide whatever support she needs.’
He added: ‘It is fantastic news that baby Jade is recovering well in hospital; I'm told she's very alert and a contented happy baby.’