There are 5 of them between a few days old to nearly 2 weeks.

Echo and chirpy turned out to be a pair. :

I changed cleaned their bird nest yesterday using rubber gloves to remove them, clean, refresh bedding, then put them bsck in.

Echo the mom and chirpy the dad were surprisingly fine with it.

My question is when can I start to handfeed them and could I remove them before 2 months or will that do harm in the form of strsss?

Basically when and how to put them on a handfed diet is my question.