At the first menu, select the "Cats" option. After the main menu appears, press Down to go past "Languages" and highlight the red button at the bottom left of the screen. Press Enter to start a hidden mini-game. Answer all questions with "Cats". Then, select "Dog". An imposter message will appear, and a second mini-game will start. Answer all questions with "Dog" to reach the Dog main menu. From this menu, select the "Special Features" option. Highlight the object that resembles a lightsaber and press Enter to view pre-production sketches. Then, highlight the green cat face in the upper left and press Enter to return to the Cat main menu. From this menu, select the "Special Features" option. Press Down to highlight the big spiked ball. Press Enter to view a joke sequence of screen tests featuring Mr. Tinkle.
Truth About Cats And Dogs