Ooooh, you were right...she buried the baby deep under the bedding - at least I know she didn't cannibalize it!
Yea, I´m sorry you had to do that, but at least you got an answer. They flatten them down so much it´s easy to miss. I believe cockatiels do it too.
I have gotten it to take a little at a time by just pushing out a tiny 'bubble' of watery formula at the tip and putting it next to baby's mouth - so far it's working, it's been three feedings so far, time for #4. It's messy, but it's safe
That is how I would do it, feed via the side of the beak so it trickles in slowly, they will start eating it once they feel it.
I hand fed my youngest hen Adelie from 5 days old, it was very difficult (compared to a 3 week old chick), going a little slower was key. I was told there were 0.5CC syringes avail.. but I checked a few chemists and never found one around here - so check and see if you have them where you are. The smaller the syringe, the more control you´ll have. I bought standard syringes without needles (if they came with the needles, I´d ask the clerk to remove it before handing it to me so they could dispose of it correctly and safely).
When I first hand fed chicks, I´d use a 5CC syringe for a 3 week old, that is the ¨norm¨... but on the last 2 clutches of chicks I raised, I really took a liking to a 2CC instead. I preferred refilling it multiple times because I found that the mess was less, the control was much more elevated.