I totally agree with you, about leaving them in longer. BUT there is web site on hatching eggs that says to pull them as soon as they are dry to get them to the feed and water. These people were really furious about me not taking mine out. I could feel the hostility in the posts. MY chics all hatched in 24 hours of each other and I moved them to the brooder. I have Probiotic and Electrolyte along with the chic starter. These chic were very nice size and all are doing fine at 4 weeks. It is really hard to leave them alone! Good luck TOM