Fun fact, dogs can see black, white, and grey as well as shades of brown, yellow, and blue. They have dichromatic vision, which is similar to humans who experience red-green color blindness.

I read this comic wrong, initially. I thought the dog was woofing in the middle of the two guy’s conversation. And there was no punchline.

The guy just puts his dog down for an inaudible “bark”. When I realized what it actually was saying I laughed twice as hard.