I started pressure canning meat about a year ago and am so happy I did. This is how I do chicken if you are pouring over pressure canning recipes/instructions:
(Note, I live near sea level and use a cheap weighted pressure canner/cooker from
Walmart with zero bells or whistles)
-butcher and skin chickens (keep skin for schmaltz if you like it)
-cut meat off of chicken carcass (not as easy as you might think but just get it off the bone in any way it comes off)
-place chicken meat directly into clean pint jars as you take it off the carcass, don't worry about a bit of fat etc going in the jar too (I can only fit 14 oz of meat in each jar but some say they can fit 1 lb)
-add 1 tsp of salt and 2 TB of water/stock to each pint jar (many people say you don't need to add any water/stock but I do)
-leave about 1.25 inch head space (I often do 1.5 as well)
-Process according to your pressure cooker's instructions and for the time and weight your altitude requires. For me doing boneless chicken is 10lbs of pressure (weighted guage, not dial) for 75 minutes.
Once you get this down you will be looking for meat in the freezer to thaw out and start canning! It is so unbelievably convenient to have pre-cooked and ready to use meat that is already at room temperature around the house.
By the way, you may want to try putting white meat only in a few jars because the dark meat turns all of the meat in the jar dark. It tastes great either way, but if you are making a quick chicken salad the dark meat looks very unappetizing. Still tastes fantastic, but looks like dog food.