What is a pig thinking?
Smarter than your dog. Politely declines to prove it.
Pigs have learned to operate a joystick-controlled video game with their snouts, understanding that moving the cursor changes something on a screen - an abstraction that puts them alongside primates on that particular task.
They also handle mirrors. Pigs shown a mirror can use the reflection to locate food hidden behind them, which requires understanding that the image is information about the room rather than another pig.
Try it on a real one
Three peeks a day, free. No account, nothing to install.