I did not practice in these postures during my retreat. What I know is that standing is also good for individuals who may find the sitting posture difficult. While you may see or know of people who lie on their backs, this makes it easy to be too relaxed and fall sleep. I was told to lie on the right side, with the head propped up by the hand. The Buddha is depicted this way in art and statues. You may want to practice these on your own.
See the links in Resources. There are a lot books free for download, and I'm sure you can find more about these postures there if you are interested.
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Meditation and Therianthropy
Non-FictionThis book is an introduction to traditional meditation techniques learned by Ulfrvif during a four day retreat at a Theravāda Buddhist monastery. The book also goes over how meditation can be used to aid Therianthropes on their path of self-discove...