I have an elevated coop large enough for 8 hens in the middle of a chicken run that is roofed and fenced on all 6 sides with 1/2" hardware cloth. The coop has an automatic door opener so that the birds can come and go during daylight. I generally leave the chicken run gate open all day so the birds can come and go to the fenced orchard (which fence includes the run and coop as well) for foraging. Three nesting boxes are attached to the outside of the coop, with an outside hatch so that I can collect the eggs. The hens get in and out of the nesting boxes from the main floor of the coop. I suspect another hen killed it because when I went out in the morning, the chick's body was laying in the dust of the chicken run, its head obviously pecked. The broody was still sitting in the nesting box with her remaining eggs, but the other hens were at the chicken run gate waiting to be let out. My imagined scenario is that the chick hatched during the night and made its way from the nesting box to the main coop floor, a matter of just inches of travel from the broody hen. Once the door opened and light entered the coop, the other hens probably saw the interloper and pounced. I don't have a way to fence the entrance to the nesting boxes separate from the rest of the coop and still leave the broody hen able to reach food and water as needed.
So with my second try, I have given each of two broody hens some fertile eggs and isolated them into dog kennels with their own food and water supplies. If they indicate that they want to leave their kennel for a dust bath or stroll through the orchard, I open the gate. They generally go back willingly to their eggs after their excursion. So assuming that they hatch some eggs within their kennels, my question remains, when is it safe to either mingle the two broody hens with their hatched chicks (same hatch date), and when would it be safe to let them mingle with the other 6 hens in the flock. Already I see the other hens bullying these two birds when they leave their nests, as they have lost "standing" in the pecking order due to spending so much time sitting instead of interacting with the other birds.
So with my second try, I have given each of two broody hens some fertile eggs and isolated them into dog kennels with their own food and water supplies. If they indicate that they want to leave their kennel for a dust bath or stroll through the orchard, I open the gate. They generally go back willingly to their eggs after their excursion. So assuming that they hatch some eggs within their kennels, my question remains, when is it safe to either mingle the two broody hens with their hatched chicks (same hatch date), and when would it be safe to let them mingle with the other 6 hens in the flock. Already I see the other hens bullying these two birds when they leave their nests, as they have lost "standing" in the pecking order due to spending so much time sitting instead of interacting with the other birds.