The Cat Lady. It’s a point and click style game that is well recieved even ten years on since its release, and has since become the first in a trilogy of sorts. Good writing, multiple endings, sad+spook with some good twists. Gameplay is definitely limited, art can be a bit unusual, but what it has to offer is worth your time.
The non human animal thing is about the confusing attitudes & behaviors humans have towards them, and how they are unequally applied based on arbitrary traits or nebulous concepts. In other words, in consideration of those individuals who desire to not be used or exploited, why everyone currently exploiting them needs to consider changing those attitudes & behaviors.
Definitely should go with PC enhanced edition these days. Easy to get setup with the new install wizard. Loads of new features, graphical improvements, and bug fixes. Even fixes for bugs that persist in all console versions of the game. Of course, one could wait for the new version to come out in about a year.