I recently learned to process my own roosters. Once they were all cleaned up and ready to be cooked, I pressure cooked them (to make the tough rooster meat a little less tough) and canned the meat and broth. I gave a few jars away and made a couple hamburger helpers and a batch of enchiladas with the ones I kept. I also found a great "Rooster Soup" recipe on
Back Yard Chickens that I hope to try soon.
A friend of mine who is new to chickens asked if I would teach her family how to process their roosters. We ended up buying 4 juvenile chickens from the feed store and I brought my two full grown roosters that will soon be replaced by the young BLRW's that are growing fast. I took home my 2 boys and 2 of the juveniles.
So today I am pressure cooking the meat - makes the meat just fall right off the bones, and holy cow does it smell delicious - and canning the meat and broth. This time I decided to save all the precious giblets from all 6 birds (my friend didn't want them, she may be sorry later =P) and have decided to make something delicious from them. I picked out a giblet gravy recipe and a chicken foot stock recipe and am going to try canning both and see how well that works.
After processing I put my roosters in gallon zip locks with brine for a few days until I was ready to cook them. With the canning rack still in the bottom of the pressure cooker, fill with water to the canning line. I tossed all 4 guys in to cook at once, this is the most I've cooked all together and it turned out great. You don't want to fill your cooker more than 2/3 full, so how many you can cook at once will depend on the size of your cooker, but check the directions that come with your cooker too just to be safe. We had some trouble getting all the feathers off the smaller guys, so rather than worry about feathers in my broth, I just took the skin off the two smaller ones.

My pressure cooker's directions say to cook at 15psi for 1 hour. So I locked on my, turned on my burner, and waited for the cooker to reach 15psi. Then I set a timer for an hour and moved on to preparing my jars. You can heat up your water to boiling before adding the chicken (while you get your chickens ready maybe), that helps get up to pressure quicker once you lock on your lid.
Last time I used regular mouth jars, so this time I am trying wide mouth. I have 12 wide mouth and some left over regular mouth. I pulled all the jars out and removed their lids and rings. If your jars aren't new like mine, don't forget to use new lids, the seal around the lid is no good after it's been used once.
My grandma taught me to sterilize my jars and lids with boiling water. I don't know if this is the best way to go about it, so you can use any method you like, this is just what I prefer.
I fill a large frying pan with enough water to cover halfway up the threads on my jars and boil. I place the jars upside down in the boiling water and let it boil for about 5 minutes.
while my jars boil, I wash all my lids really well with soap and water, and set aside.
After the jars are done boiling they go upside down on a clean dish towel to dry and cool. When all my jars have been sterilized, I pour the leftover boiling water over my bowl of lids
*I have been told this can melt the seal on the lids and prevent them from sealing correctly, I feel better having boiled the lids, but this is just how I was taught and is up to you*
My rooster timer has gone off, follow the cooling instructions for your canner, but I turn off the burner, move the cooker to a cool burner, and let it cool and release pressure on it's own. Follow your cooker's instructions for when to unlock and remove the lid.
Meat falling right off the bones
I dump the contents of the whole cooker into a colander in a stockpot (in the sink, I'm a spiller lol). While I let the broth drain into the stockpot, I start putting the meat in my jars. I like to just pull it off the bones with my fingers and pack it in the jars until they are full, about an inch from the top. The skin, fat, and bones all get separated out and put in a gallon zip lock to be used for stock later.
Wipe the rims of any messy jars clean with a clean wet rag and put your sterile lids and rings on. I just screw the rings on gently, and tighten them later.
Wash out your cooker really well with soap and water. Once your cooker and rack are all clean, fill it to your directed canning line. To help with hard water stains on your jars, you can can a tablespoon of vinegar. Place your jars on the rack and lock up your canner. My directions say to can at 15psi for 10 minutes.