It's very situational how a broody hen will respond to predation
A few years ago I had a Red Junglefowl / American Gamefowl hybrid hen go broody in some palmettos maybe 20 feet beyond my fence. She was pretty hidden and so I decided to leave her alone
Three weeks later on the night of hatching I heard her give off a terrible scream and I went running out there with a light. I see the eyes of a weasel reflecting at me from on top of the nest. No other life to be seen, only egg crumbles. The weasel must have heard the babies hatching. It ran away almost instantly on seeing me and I figured the babies were all dead
The next morning at feeding time she's out there with 9 healthy babies. She must have returned at some point during the night and collected the chicks that scattered and hid, while avoiding further predation. I was very impressed
So in short with game breeds-
- Hens on eggs will abandon them during predation
- Hens on eggs and chicks (at night) will abandon them but come back for survivors
- Hens during the day will fight predators to delay or distract them while her babies either run to safety or hide
I've had Red Junglefowl, American Gamefowl, Asil, Cubalaya, Sumatra, Rhode Island Red, Orpington and Silkie broodies before. I will never again have a broody without fighting blood, be that from game or wild backgrounds. There's just no comparison to the quality of mothers they make