Time is not on your side when you collect eggs to hatch. Properly stored, they can be "held" for up to 7 days. After 7 days, viability declines very rapidly. After 2 weeks of holding, you have about a 0% chance that any of your eggs will hatch. There are charts available to show exact losses for each day more than the optimum 7 the percentage drops.
Why would you want to shake an egg particularly if it is incubating - the reply is a definite no I wouldn't shake an incubating egg
Let a hen handle it.
Incubating the eggs was necessary for their survival.
Once You get the egg you have to walk/run/cycle a long way with the egg in your inventory until it hatches an incubator - but it is a process that takes many important steps, monitoring temp and humidity. please google "incubating duck egg"
A long time. But it does eventually hatch
The platypus spends ten days as an egg incubating within its mother, until the egg is laid. This is the first stage.
Allow the hen to brood the egg, find a surrogate hen willing to brood, set the egg under another brooding species like a goose or duck.
3 weeks (21 days)
If the shell isn't too thick or heavily coloured, you can candle the egg. Hold the egg up to a bright light, don't let too much light come round the egg, and you should be able to see the contents. For people incubating large numbers of eggs artificially, there is now a machine that can pick-up heart-beat inside an egg - Egg-buddy.
A bird egg is hatched by heating, or incubating it and waiting until the chick hatches. The time it takes to hatch varies from species to species.
for about 3 months
Absolutely nothing if you are not incubating the fertilized ones. There is no visible difference, no nutritional difference and no taste difference.