I had never heard of this until I saw an episode of life below zero where a guy did it he claimed he just kept boiling all the tendons and stuff down but that’s tv too I’d be interested if the process my self
You can also just add hooves in with your bones when making stock. The tricky part is getting them clean enough to cook. I spent some time with a wire brush and soaking them in vinegar.
Yes I believe so. I have many cut out shapes like stars and hearts etc. I'm actually interested in the collagen aspect of it for my knees. Thought there could be cheaper way than to buy a container of it.