I got kinda fed up with fighting CB baby pyros, greeri and various rattlesnakes and took a hardcore approach with the attitude that if it died, oh well, I was selecting for better captive stock. Turned out to be the best thing I ever did and I haven't lost a baby to starvation since I went that route. I have come to the conclusion that until they get that first meal in them a newborn/hatched snakes metabolism is "ZERO" Once they get something in their stomachs the metabolism kicks in. Natures way of getting late babies through the winter till next spring. Nowdays those babies that don't eat within a month or so after being born/hatched go straight into four months of hibernation. They always come out fine and very ready to eat.
In the past I used to force feed a couple of meals then hibernate, or force feed all winter, but they didn't do nearly as well, and I often lost a couple babies. Not only was the hardcore approach much more successful for me, it was a lot less work!