Yes, it is best to gather all the eggs you want her to hatch before you give them to her. Start them all at the same time so they should hatch together. Chicken eggs take about 21 days to hatch, though that can vary a couple of days depending on various things. I’ve had them hatch as early as after 19 days under a broody in real warm weather.
i gather the eggs for daily but i leave them on the counter in the house before i used them [eating them] can i gave some back to the first whole day after she sit on nest?
I always have a broody spend two nights on the nest before I give her eggs. I’ve had several that were just teasing me. They acted broody but really were not. She has to prove to me that she is serious before I give her eggs.
You can store eggs for a week or more on your counter and they will still hatch as long as conditions are not too bad. If it is above 80 degrees, they can start to develop a little so it needs to be a little cooler than 80 degrees Fahrenheit. If you keep them more than a week, you should turn them. A hen cannot count days, so you are not in a rush to get eggs under her. You can wait a week or more if you need to.
when can i candle the egg to see if it is ferite?
I usually wait at least until after 7 days of development. Usually by then you can see veins. But don’t get in a rush to throw them out if you don’t see clear veining. Sometimes, especially with brown eggs, it can be hard to see. I wait until at least 14 days to toss any. By then, you should be pretty sure.
how long does it take to hatch an egg under a chicken?
In theory, 21 days. But there are a lot of things that can affect that. If the average incubating temperature is a little warm, they can be quite a bit early. If it is cool, they can really b elate. Other things that can affect them are heredity, size of the egg, humidity, and how you store them before you start incubation. As I said, I had some hatch after 19 days under a broody. I was on a trip and thought I’d be back in time for the hatch. I blame that mostly on storing the eggs a little too warm, but they were also those little pullet eggs. I think them being small for the breed was also part of the problem.
One problem you probably had was that they had more eggs than they could cover. You need to mark the eggs you put under them and check under a broody every day to remove any new eggs. If they get so many eggs they cannot cover them all, some will cool off and die. Then those eggs get moved back under the hen and another egg gets pushed out to cool off and die. Other hens will keep laying with them a lot of the time so you can get too many eggs. You need to check under them daily.