When they hatch and she brings them off the nest down to the dirt--(the 3ft drop will be no problem)--I would keep checking on them---to make sure all are together----she will probably stay on the dirt for a few nights till they can get into the coop, BUT she might not---she might go into the coop and some chicks make it in, some don't. The ones that don't will die if you do not help---put them with Mom. Most chicks can start flying a little by 3 to 4 weeks old they got to get some wing feathers first---some longer, some sooner. I do not want to loose any chicks so I build a place for them/her so I do not have to worry if they make it in----I try to do anything/everything I can to keep from Loosing ONE!
I guess I made a bad choice due to no being experienced.....I felt so bad for her sitting on a golf ball so faithfully that I wanted her to have eggs. Now I can't just get rid of the eggs until I see how they do. After this I will be prepared before letting them try to raise babies. I will get someone to build me a box for the hen and her eggs/chicks. Thanks for the advice everyone!