I'd move the broody in to a safe area...like that cage if I were you.Yes she’s hatched before and beautifully! The offending Mama was removed from the nest, eggs happily taken over by #2 broody and Mama doesn’t show any signs of stress at all. In fact, she seems very happy and eating/drinking while chatting to her mates.
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Is that veggies growing back there on the left?
That is a neat contraption.