I had a broody Blue Wyandotte hen about 10 days ago. She was 10 months old and had become all completely aggressive and sitting hard on the nest, all day long, her body was super-hot and her chest/belly was completely bare. I tried removing her from the nest numerous times during the day, cooling down her bare chest in the cold breeze before placing her on the ground outside. Didn't work. She'd run around for about 1/2 minute, then Oh yeah, gotta sit on that empty nest. And back she'd go. She was barely eating, and she pooped the most horrid huge stinkers.
That was April 5. I went to the hardware store and picked up a bale of wire to make a broody cage. In the meantime that day, I locked her out of the henhouse, away from the nest. She spent the day crying, pacing back and forth in front of the coop door, desperate to get back inside. That evening when they went inside, she went back to the nest. At nightfall, I moved her onto the roost (to allow the cool night air to flow under her). She wasn't able to find her way back to the nest, it was too dark.
The next day, she was less broody. I removed her in the a.m. from the nest, cooling her belly/chest in the wind before placing her on the ground. That night, though, once again I had to take her off the nest and put her on the roost.
I did that, for 3 nights...moving her to the roost at night after dark when she couldn't find her way back to the nest. I never built the wire cage and I never had to lock her out of the henhouse again. I took the wire back for a refund. In 24 hours, she stopped being broody during the day, and at night, she'd try to sit on the nest but I would move her back to the roost. But it took 8 days for her to resume egg-laying, which she did TODAY! So, a little over a week and we're back to normal. Tada! I'm so relieved. But I feel a little guilty for breaking her - she so badly wanted to be a mother hen.