I like to pour mine into containers to freeze - usually a mug sized container, so I can defrost and use either a single mug, or several to make soup...
Calf's foot jelly and cow heel jelly have been made for centuries and were considered an excellent food for invalids. I use pigs trotters more often...
They do make stunning broth which is full of gelatin - it sets almost solid! But I do always cook them with the carcass of a roast chicken, or a ham...