I don't think you said what you did with the feet?
They make the BEST stock! (You have to "take their socks off" -- scalding them then peeling off the outer cuticle down to the toes where you sort of pinch off the toenails).
My method of making stock is to dump whatever I am making stock out of into my large, oval crockpot late in the evening, cover with water, let it run all night on low, turn it off when I wake up, then do all the straining, etc. midday or early afternoon after it cools.
Stock made with chicken feet sets up so stiff that you can literally cut with with a knife. You actually have to dilute it to cook rice in it.