In this answer to another question, someone mentioned that they got gelatin out of rendering cow fat. I'm about to render a bunch of cow fat in a few days, and I was wondering how to get gelatin from it, in addition to the tallow? (i.e. I don't want to accidentally throw any good non-tallow parts away)
Do I have to use 'suet' or can I use any cow fat? I'm just getting "the fat" from a cow, and it's probably going to be mixed together.