Nest box pains

As they grow, the space in the nest box shrinks! It's only logical, yet, I wonder why I never provided them a much larger one.

Some of their wing feathers have sprouted out of the 'straw' - It's quite clear that the oldest is a dark grey, the middle - more cinnamon - as for the youngest, it has more yellow.

I will have to begin handfeeding them as a supplement very very soon - it's nerve-wrecking.