I forgot to encourage you about this post.
A broody I had an Arucana named Smokey was so tiny and quiet and let everyone near her and her new chicks the day they hatched. I worried about her ability to protect them. Then the WL roo walked over to one welsummer chick, picked it up, and flung it a bit. It turned out to be a rooster so maybe he knew that early he'd have competition. At any rate Smokey jumped up and attacked that rooster and made such a fuss he stayed clear away from her. And nobody went near her or her chicks without retribution. I didn't worry about her anymore.
I had a broody named Topsy who was the tiniest silky and last in the pecking order. I worried about her until I noticed her teaching her chicks how to avoid the larger higher ranking girls. She did defend her babies a couple of times, but overall her strategy was avoidance and it worked well. So I quit worrying about her.
Those two broodies are now in chicken Heaven, but they taught me that I can trust the protective instincts of the broody momma.