I got a call from a vet nurse at Murdoch Vet Hospital and here is the result. I estimate him to be about 10-14 days old as his eyes are open but he doesn't have any teeth. He's got good lungs on him! He's still very distressed - feeding well but still constantly searching for mum.
We think mum missed him as she was moving her kits to a new nest. So he's getting lots of loving and starting to cuddle up to snugglekitty.
What a cutie!
What a cutie!