Some answers first...About 2 months ago I was away for three days and when I checked on the palms I found 2 eggs in the nest box. I don't know how along apart they were laid.

Both chicks doing well. This tip is from a birdkeeper in Bali Bird Farm who has hand raised numerous Palm chicks :

Ground nuts - in a blender (almond, cashew, peanut, kacang kuda etc) and nestum or gerber baby food - NOTHING CONTAINING FRUITS- only grains.

Observing the pair, I'm sure they won't raise 2 chicks at a time cause the work seems to be too taxing.

Hand fed chick doing as well as the other one. I'm told they need up to 100 days to complete weaning.