Hypertay: i read how you have broody hens, and judging by your comment you don't want them to be broody anymore? I have the same problem every month with three of my hens trying to be little mothers. I have a few hand me down dog kennels, and I use one medium sized one for my broody buster. I take the plastic floor out of the cage so it's just wire all around, set it on the roosts, and put food and water for them. Not putting any bedding helps air flow, and doesn't allow them to feel cozy like they do in the nesting box. Sometimes I fit two birds in one, and it takes about three to four days to break them. My girls are just over a year old and I've had to do this method a dozen times...in fact I have a broody mother right now. So I put her in the cage for now and in a few days I'll let her out. I do take her out at least once every day so she can stretch, run around, and remember how nice it is to be outside and not stuck in a stuffy nesting box day in and day out. So just a helpful tip!
Also on the subject of this thread. I take plastic containers and fill them with water and put frozen berries:strawberries, blueberries, raspberries, black berries, and freeze it into an ice cake and they go nuts over it. I have this one hen that will go after the ice like it's the best thing in the world...she'll hoard it in the corner and crack the heck out of it!! it keeps them cool while it is still frozen, and provides an some nose diving in nice cool water.