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YourSoJelly
That link has a lot of information in it that I would never recommend:
Extra Vitamins: It talks about adding more Vit.C and Calcium during and after pregnancy. I would suggest *maybe* adding more Vit. C because that could never hurt but DO NOT give a calcium table or anything along those lines. If you want to add more Calcium to her diet I would recommend higher calcium veggies, alfalfa based pellets or alfalfa hay, which is much safer than a tablet.
Removing Sows from other sows: In that link it talks about removing the sow away from other sows prior to delivery. It states that its dangerous to have her in with other sows, this is completely untrue. In most cases and from personal experience, other sows will mother and help care for the babies. I think that if what the writer of the site says is true, that this is very rare.
Handling Pups and Sow: It says not to for the first 2 weeks, again untrue. You can handle them right away. Just make sure they are still getting plenty of time with mom and remember that they are babies and very fragile.
Heat Lamp for Pups: This is not only not needed but it has potential for a fire. Some fleece bedding like a cozie/sack or some draped fleece works perfectly and is safe.
Weaning: There is no real "weaning" period that I am aware of. There is a time where you need to separate any male pups from the mother and sister, which is 21 days. Once separated, if they are all in good health you can rehome them. You don't have to do that right at 21 days, that is up to you, but the earliest is 21 days.