I make stock all the time, the kids prefer the gravy granules, sadly. I use all the stock making soup, we wouldnt have enough for gravy too either...
I amke it in the slow cooker, you need vinegar to help leach the good stuff from the bones and to let cook for 24 hrs, dont like adding herbs or wine to it, rather make the base so we can use it for soups
i amke it weekly/every other week and wouldnt have enough for my greedy kids and gravy!
we do add a little too the granules though, as well as the chicken juices..