The problem is that unfortunately most of that common knowledge is anecdotal. I can say my dog whines distinctly different, as if thinking/asking about my SO when they’re at work for example, but it’s incredibly difficult to pin scientific research to that. I’m all for broadening our understanding the wonderful creatures we share this planet with!
There’s a few permanent license alternatives that I’ve heard recently. I’ve been researching Plasticity and Alibre Atom3D