When to move chicks is a personal decision. If you have your humidity up in your incubator and it recovers easily and your brooder is set up and warmed at one end, then you should be able to move them when you are comfortable. Some people wait until the end of the hatch to move chicks. Some wait until they are fluffed up and dry. I move mine as they become active and start running around in the bator.UPDATE: (& QUESTIONS
First little chickie's out! <3 I'll post pictures when she's fluffy.
When can I put her into the brooder? There are still about 15 that have yet to hatch. There are also 2 infertile eggs that I have marked that I used to hold up the thermometer on egg level. Should I take those two out?
Now, it is true that the sounds of the previously hatched chicks will help motivate the others. I use a video of chicks chirping played by the bator periodically during pipping and constantly if I have a zipper. My bator is also w/in feet of my brooder so they can hear them as well.
Whether you take the unviable ones out is your call. As long as they are not stinking or leaking, it doesn't matter.