Chicken-Farmer, I had forgotten about butter/milk to soak in. That would work wonderfully, yes. I'm tempted to try it w/ kefir one day. With goat's milk it has a very nice buttermilk taste to it.^^
I didn't even think of canning jars. My vacuum sealer has an attachment that will suck the air out of a canning jar. 5 per jar though??
Canning jars are wonderful! When I boil down an entire chicken I separate the white, dark & fats then put them in jars to freeze. I can stretch one chicken for a whole month's worth of meals (many side-dishes/sandwiches/etc) The freezing lasts a long time (months easily), stacks nicely as cans & they don't get freezer burn. The jars also come in diff sizes so it's easier to portion them out based off your family size/needs.
This is my personal method for boiling down a whole chicken, without gizzards/guts, I bet you can do the same with quail.
Step 1 - Cooking: Put dressed bird(s) in a big pot & fill with clean water. You can add fresh veggies & spices now if you like, but not needed. Boil everything till meat
is ready to fall off bones*. Should take an hour. Take bird out quickly & let cool a couple minutes on a plate to debone (it's easier to de-bone when it's still warm). Keep stock on stove.
Step 2 - Prepping the Meat to Freeze: Once the cooked meat is put in proper piles (light/dark/fat), put into jars & cool further in fridge. Freeze when cool. Leave a tiny bit of head room, put a disk of freezer paper on top of meat.
Step 3 - Boiling bones & Finishing Stock: Put all the bones in a fresh pot of water. Add a bit of ACV to pot. Boil. This draws more flavour from the bones. Boil down & add to first boil's stock. Simmer down another hour or two till desired strength.
Step 4 - Drying Bones: Spread bones out on cookie sheet & either dry in the sun or in the oven on low (as you would dry herbs) for a day. Once bones are 'bone dry' (pardon the pun) you can crush them w/ a hammer (cover bones w/ cloth so no flying shards) or a grinder (use an old one or one just for bones/eggs). You can now use this as bonemeal for your garden.
* I know some people can eat the rib bones on the quail as it's so soft. I've never cooked quail so you may need to de-bone first & put the bones in Step 3 pot instead.
Enjoy!