Rebecca Kelly and Jack Rounds welcomed their fourth child, Oaklyn, on July 23 at South West Healthcare's Warrnambool Base Hospital.

Three days after he was born Ms Kelly noticed he was breathing faster than normal.

"I had the nurses come and check on him - they got the paediatric team to come and check on him and they heard a murmur," she said.

"The next morning they did an echo cardiograph on his heart and found out he had two holes."

Doctors told the worried parents Oaklyn would need open heart surgery due to the size of one of the holes in his heart.

Ms Kelly and Mr Rounds are with their son at the Royal Children's Hospital.

Doctors inserted a feeding tube in the hope it will help him put on weight to make him stronger in the lead up to his surgery.

Ms Kelly said she and Mr Rounds had been blown away by the support they had received from family and friends.

"We are extremely grateful for all the support and donations everyone has given to us. wwe feel very blessed to have amazing people that we know and even from people we don't know, just knowing we are not alone and that all these people are supporting us through this tough time," she said.

Ms Kelly's aunt Kerry Murphy set up a gofundme page to support the couple, who have dropped everything to be by their son's side.

Back home, the couple's other children Makenzie, 10, Arlo, 5 and Ryder, 2, are being cared for by Ms Kelly's parents.

You can support the couple by making a contribution to the gofundme appeal here.

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