Look at pictures from video
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So uh animal legs, you cannot add just plain straight legs that's a big no no, don't do this! Add bend if you wanna draw animal legs,
Okay so there's thigh, calf, heel and toe plantigrade is where heel and feet are on ground, Digitigrade is where there is only toe on ground, bird feet, think of a lamp with the really large base, think of the base as the feet so add large feet then thin but tall legs because the feet carry the height of the bird.