One day old chicks are ok to feed for a bird-eating snake like Morelia viridis.
But not when you ONLY feed them to your snake.
Bring in some variation with mice or rats.
But that was the problem, I know.
The possible solution...
when your viridis accepts oned day old chicks, you have an instrument to fool him/her.
Cut a chick open and rub a mouse with the suff that comes out of the chick.
Chances are great that your snake acceps it.
Another way is... when the snake is busy eating a chick give him/her immediately after the chick a mouse.
Or put the mouse in the mouth of the snake when he/she is swallowing the chick.
Use some big tweezers.
Another tip... feed in the late evening.
Another tip... spray the terrarium half an hour before you want to start the feeding.
Hope you can understand what I wrote above.
I´m Dutch and English is not my first language.
Good luck with your snake