What I’ve read (FWIW) is that birds are like this (able to go so long between hatching and food/drink) is because mommybird is obliged to stay on that nest until the last viable baby has hatched.
Meantime the more precocious sibs just have to be patient and wait. They go on the strength of the yolk. If they can’t wait, they die and thus they don’t pass on that maladaptive trait. So, chicks who can wait will eventually pass on the same ability to the next generation.
The early hatchers mustn’t leave the nest without mommy’s supervision to go in search of food, or something is likely to eat them. If this happens, they won’t get the chance to reproduce and chickens who do wait will produce chicks who can and do wait.
This is why poultry hatcheries are able to ship just-hatched chicks to us (some even ship just-hatched quail (but not the kind I want, that I know of)). If the chick eats and/or drinks, then that ruins it for shipping. Once they eat and drink I guess that kind of turns the key. Even if it’s right after hatching. After that they MUST eat and drink. They hatch, get fluffed up, someone pops them into a box and they’re off to meet their people. When they arrive, they are HUNGRY!