Dogs:
* See fewer colors: They're dichromats, meaning they see two primary colors: blue and yellow.
* Less vibrant world: Their world is likely less colorful than ours, with reds, greens, and oranges appearing more muted.
* Excellent night vision: They have more rod cells in their retinas, making them much better at seeing in low light than humans.
Cats:
* Similar to dogs: Like dogs, they're dichromats, seeing blue and yellow.
* More sensitive to light: Their pupils can dilate and contract more rapidly, allowing them to adapt to different light levels better.
* Stronger "night vision" than dogs: They also have more rod cells, so their night vision is even better.
Key takeaway: Both dogs and cats see color, but their color vision is different from humans. They see a world with fewer colors, but their night vision is far superior.