Great info. Very insightful.
I agree, that sometimes an assisted hatch may or may not reveal additional problems that the bird may have.
This is for next time should it arise...hopefully not.
But here goes...
I have experience with hatching/breeding parrots, may I suggest,( if someone else hasn't already) that once you decide to assist in a hatch, make it easier on yourself and get a cup of some warm, sterile water and a Q-tip. Use the wet Q-tip and swab the dry membrane to make it supple enough to work with. It's very easy,(especially if you are going too fast) to pull part of a dry membrane too far, and depending on where you are in the membrane, the chick could start to bleed out. You'll be able to see inside more by folding back any soft membrane that still has active blood vessels in it without making things worse.. You'll then be able to assess, whether should you keep going, or wait a bit should, you find an unabsorbed yolk, etc.
Hope this was helpful.
Just my 2 cents.
