Allow me to apologize in advance for the layman's terminology.
I'm wondering what the anatomical term for a cat- or a goat-style hind leg is.
Cats, goats, t-rexes, and many many other animals don't have human hind legs (i.e., with one knee / one pivot point). They have two pivot points, with one bone going down, then another going back-ish, then another going down again.
I've googled and googled for the answer, but I'm completely at a loss as to what this is called! Is there any name for that style of leg? I'm sure there's a lot of variation inside the category, but there is a category, correct?