If she's pacing and squawking, she's probably not ready. I had to break one broody this season. I didn't have a wire bottom cage to elevate so I put her in my "hospital" which is just a wire dog crate with wood shavings. I put a roost in there with a fan blowing at it. I would approach the cage each day with a handful of scratch which I would offer directly from my hand. It didn't matter if she took it from me or not. If she puffed up like a turkey and started clucking at me, she wasn't ready to come out. When she went back to "happy chicken" when I offered treats, I took her back to the flock the next day. She spent about a week and a half in the kennel.