How long do I leave her on the nest with hatched and unhatched eggs!!

[ilovechickens]

I have a Cuckoo Maran hen that hatched 3 chicks on Saturday and Sunday, and still one egg with a peeping sound. How long should I wait before I remove the last egg, with a faint chirp, no pipping, and she will not get off the egg to feed the other chicks.
I removed 3 eggs from her this morning, 1 Pipped, but that was it, another one under developed, and another one under developed. This is the last egg

 

[chickensducks&agoose]

shouldn't your chicks be feeding themselves? Chick starter?

 

[Tiramisu]

I would leave the egg if you hear chirping and wait for it to hatch. The chicks should be fine as long as food is provided near then.

 

[ilovechickens]

They have water and chick starter, I guess I thought that for some odd reason that mama had to teach them how Now thinking about it, my chicks that I take out of the bator or box, they eat by themselves