Thanks ALL for your opinions and info on your past experiences! My Pullets have been laying for about six weeks and seem to be very healthy. From what your saying, I think I might try a few eggs in the incubator and see what happens.
Wish me luck.... !
Being a naturalist, I believe staying as close to nature as possible is the healthiest way.
That being said, I would assume a hen reaches maturity before going broody for a reason and the eggs she would produce during this time would be of the healthiest stock.
Someone said earlier about mis-shapen eggs, X-hard shells, etc. I think this would be the biggest potential problems.
Technically (from what I understand), a pullet is anything less than a year. If your pullet is laying decent sized eggs regularly, then you should be fine.
My luck with incubators is not great, so I depend on broody hens. As an aside, when I cross two non broody breeds, I get hens who like to go broody in the first month of laying and then never do again--go figure! Anyhow, If you've been hatching chickens at all you know it doesn't always go well for every egg. I have been googling the pullet egg question and I hear a lot of alarmism. So far no one has said they tried it and got deformed chicks--although lots of people predict this outcome. Frankly if an egg doesn't hatch, for me, it's an "Oh well!"
All that said, I have a young hen (half Easter Egger and half Leghorn) who has as of today has laid 78 eggs in a row--no days off-- and though she is full size, her eggs are just now getting up to medium size. Earlier, I put one of her very smallish eggs under two different broody hens--one hatched one didn't. "Oh well." The hatched chick, is still slightly smaller than her group, but very vigorous.
As another experiment, I just put four pullet eggs (less than a month of laying and pee wee to small size) under another hen and will know more in a couple weeks. Consensus seems to be that some hatch, some don't but I think the prediction of deformities is over-rated. Really, if it were possible to eliminate all life's risks, wouldn't it be boring?