UPDATE: GOOSE TO COMFORTER
I have completed my first down project, a baby crib/throw blanket, measuring appx 45inx60in. I had down from 4 adult geese and 3 adult ducks, plus the downy fine feathers.
I tried to wash the feathers, but that in itself was a bit of hysteria! The washing didn't seem to penetrate the down, as only the outer layer of down was even wet. Down must have some sort of oily factor that keep them waterproof? Maybe a better method of washing might be to submerge the feathers in a tub or bucket and wash loosely by hand. That is, if I ever try to take on such a thing again! WHAT A MESS!
I wanted to find the highest quality cotton to use, and ended up with a Muslin from the fabric store (the highest grade I could find). I wanted something with a high thread count, thinking that it would be better at preventing the down from escaping through the weave.....
I sewed the outer perimeter of the comforter, leaving a 12in gap top center, and then turned it inside out (right side out). The size of the gap was nice because I was able to fit the entire trashbag full of down and shake it out into the comforter (only 1 or 2 stray feathers!) I wasn't sure how well the down would even out inside the comforter, but I decided to dump all the down in anyways, and then sewed it shut!
Then I layed it out on the floor and the down out spread easily and evenly throughout the comforter. The only real difficulty I had was pinning the comforter to ease in sewing it. What worked best in the end was to pin all 4 corners of the comforter to the carpet to hold it tight. Then I measured my grid (15inch boxes, which in hindsight, is a little large. I should have gone with 10-12in.) Then I used a marker to make dashed lines of my grid directly onto the comforter.
Rookie Mistake: I placed my pins parallel to where my stitches were going to be, which was a BAD idea! The pins should be placed perpendicular to where you are stitching to help keep the bottom layer of fabric flat!! My sewing would have been SO much easier!
For the sewing, I used a tight stitch for the exterior stitches (appx 10 stitches per inch). For the "quilting" I did a loose stitch (appx 5 stitches per inch), hoping that the less stitching holes I place in the surface of the comforter, the better.
Now, I just need to be brave enough for the first washing!!