Normally, mom will leave the nest when she feels that she's given the other eggs long enough time to hatch.
How safe is the area around her? Is it fenced? Does predators have access? Baby chicks can easily be taken by predator birds while they're young. A bird net over the area she's in will be a good precaution. Hanging strings and ropes are better than nothing.
How safe is the area around her? Is it fenced? Does predators have access? Baby chicks can easily be taken by predator birds while they're young. A bird net over the area she's in will be a good precaution. Hanging strings and ropes are better than nothing.