you can either break her broodiness, i locked my hen out of her coop evry day for about 3 days and that did the trick, or give her some fertile eggs to sit on (you can get them at the hatchery) i did this a few weeks ago with my silkie. leg horns are chickens for producing eggs and very rarley go broody so if you want more chickens let her take care of them. it is so much easier. about a year ago i got some chicks that i had in a kiddie pool in my house i had to clean it out, feed water, and clean any poop off of them everyday. when i had my silkies raise them i gave them food, water and made sure they were all there everynght. soooooooo much easier. whatever you do good luck