I would guess that you are right on the breeds. The leg feathering I think is a mixed bag. I have half faverolles that have heavily feathered legs. I have half marans chicks that have maybe 2 feathers on each leg.
The chicks can survive for up to 3 days without eating. However, food and water should be available to them starting now. You should have chick starter and a shallow water pan available to your hen. She will show the chicks how to eat and drink. The hens will crunch up food for the babies and cluck to them as she drops it on the ground. The chicks will come running and eat the food. It is really cute to watch! You can also join the broody hen thread and get a lot of good info there.
Tonight I hand fed mom and babies. Also gave them water but neither mom or chicks drank much in my opinion. When should mom leave the nest with them? My boxes are about 12" off the coop floor but is covered in about 6" of straw so I don't think any injuries would occur if the babies hop out. They do however have to walk down a pretty steep ramp to get out. Just curious how long should they stay in before they'll venture out with mom?
You guys and your advice are great. This newb really appreciates everything. Thank you.
Brian