Hi! I've had bad experiences and great experiences with both Broodyhens and incubators. Things like power outages really spoil incubator plans, even if yours is a great one. Giving first time broodies eggs too soon also is a giant risk.
I have had great results with the brazilian incubator we now have, its designed like a toaster over

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I have had some great broodies, too. These girls would allow you to make nests for them and put them anywhere you wanted to.
My "best" broody nest is a plastic milk crate.. the one like a cage. Set up the nest in there, put in some infertile eggs and place the broody. Cover with a board. You can rotate out the eggs to keep them fresh enough to eat as you give her a week to get settled. Now, three or four routes are possible if she "sticks". (Note: you are turning her out each afternoon to eat and primp AFTER all the other hens are out of the coop. Also, you must stand guard nearby to avoid hiccoughs. Unless you are setting her where other hens or animals have no access to her nest.)
First option: After a week of firm setting, give her some fertile eggs. Most small hens can set 5 normal sized eggs.
Second option: After a week of firm setting, give her some eggs and set balance of eggs in the incubator. Remember: Normal sized hens can brood 25 chicks , or more in warm weather/or with brooder heat help.
Third option: After a week of firm setting, give her some eggs, send off for hatchery chicks to make up the balance. (Be sure to get the hatching dates correlated nearly exactly. You want to be able to add those chicks BEFORE she leaves the nest. I like them to arrive ON hatching day.)
Fourth option: Keep swapping out the store eggs.. about every three days. Order your chicks to arrive between two and three weeks after you have set her. Swap the eggs for chicks under her at night when they arrive.
I sometimes have to move Mrs. Broody and her chix from the coop to a grow shelter(there are low roosts in there, too) but they all get turned out with the flock in the afternoons after two weeks. Momma takes them back to their shelter to sleep. When they are Two months old I remove her back to the coop. She screams a couple of times at her husband(who doesn't?) then settles back into normal chicken life and starts to lay again soon.
Hope this helps somebody.






