Here is info I found on the web.
Fron E How:
Start the machine and allow it to run for 30 seconds to start combining the detergent and water. Stop the machine and place one to two goose down pillows into the water. Two pillows are best, as it will help to balance the machine, but the number of pillows you fit into your machine depends on the size of the machine. Push the pillows down into the water. Squeeze out any excess air so that the pillows stay in the water and do not float to the top.
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Allow the down pillows to soak for two hours. At the end of that time, again squeeze the air from the pillows if necessary. Start the machine to complete the wash cycle. If your machine does not have an extra-rinse cycle, set it manually to rinse a second time to ensure that all of the detergent has been removed from the down.
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Place the pillows into the dryer. Put one or two tennis balls into a clean sock. Put the balls into the dryer to help fluff and separate the goose down as it dries. Set the dryer to the medium heat setting and turn it on. Check the pillows as they dry to prevent the goose down from becoming overly hot and burning. Take the pillows out every 20 minutes to fluff, which also prevents overheating.
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Remove the pillows from the dryer after they have thoroughly dried. Goose down pillows may take two hours or longer to dry completely. Avoid removing the pillows too soon to prevent mildew.
Read more: How to Clean Goose Down Pillows | eHow.com http://www.ehow.com/how_7020711_clean-goose-down-pillows.html#ixzz1hxUym3rI
From the Down Factory: Use hot water. Set machine on extra rinse cycle if you have one. Start the machine. Fill with water. Add one-half cup detergent or non-detergent soap.
Permit machine to run 30 seconds to thoroughly mix soap and water. Stop machine. Place the comforter or 2 pillows into the water and push under and squeeze out as much air as you can. Down is very buoyant and floats high on top of water — it doesn’t want to get wet so it may take a little work but it’s worth it. Permit Comforter to remain one-half to one hour soaking and Pillows about two hours, then squeeze out the air again, or if you have a pre-soak cycle on your machine use that instead. Start the machine and complete the washing cycle.
Place into dryer set on HIGH heat. Monitor the drying by checking on your item about every 15 to 20 minutes. Shake vigorously all direction and place back in dryer. Repeat this process until its light and fluffy. Monitor your dryer often, as you will want to take the item out of the dryer immediately when dry. Some dryer drums get hot and may not be good for your Down item if left after your dryer stops. Shake well and Sleep well.
This information is furnished as guide on washing Comforters and Pillows manufactured by Don Shingler. We cannot be responsible for other manufacturers’ fabrics, sewing techniques or washers and dryer idiosyncrasy.
From yahoo: If you decide to wash at home in your washer, use the gentlest cycle available on your machine. Use warm water and a mild liquid detergent, using only half the amount you would use on a regular small load of laundry. Before adding the pillows to the wash, first agitate the soap in the water until it is mixed, then stop the machine. Carefully immerse the pillows, and then start the washer again. Use the rinse cycle twice.
To dry down pillows in your home dryer, set the dryer on low. It may take a few hours, so you should periodically remove the pillows so they don’t get too hot. You can also loosen clumps of down with your fingers at this time.
If you need to revive flattened pillows because they’ve lost air over time, you can put them in the dryer on low for ten minutes.Toss in a tennis ball. It will help fluff up your pillows. If your pillows are older, you may also need to eventually add more down to keep them fluffy and full.
from Infobarrell: 1. Inspect your feather or down pillow to make sure there are no tears. If the down pillow has been damaged you will increase the damage to the pillow in the washer. Some times rips and tears can be repaired. If your down pillow is expensive you might want to take to the dry cleaner for repair, prior to washing.
2. Wash one or two feather goose down pillows at a time. Don’t overload your washer with other clothing or household products you may need to wash.
3. Make sure the washer machine is on the gentlest cycle. This will help to protect your down pillows from excessive wear that washers can cause.
4. Use a mild detergent and never use bleach for your feather pillows. Treat your feather pillows as a second skin, as that is essentially what feathers are.
5. Place your pillows in the dryer. Note that they will take longer to dry than a normal clothing. Tennis balls can help fluff your pillows in the dryer. Dry towels can also aid in drying quickly.
6. Take your feather pillows out and fluff them by hand during the drying cycle. Remember to feel for clumps and flatten out with your hands as you don’t want your pillow to dry and end up with clumpy down or feathers.
See, washing goose down pillows is not only possible but effective and not to mention cheaper than taking to the dry cleaner every couple of weeks.
Read more: http://www.infobarrel.com/Washing_Goose_Down_Pillows#ixzz1hxUYUVH0