Black and White Vision in Dogs The idea that dogs only see in black and white is antiquated.
Dogs have dichromatic vision, meaning they can see blues and yellows but not reds or greens
Dogs with dry noses are sick. Dry noses in dogs are often interpreted as signs of disease.
For non-health reasons such ambient conditions, hydration levels, and time of day, a dog's nose might go moist or dry.
Behavior and other symptoms are better indicators of illness than a dry nose. A dog's nose temperature and wetness might alter multiple times a day.
Dogs Eat Grass When Sick Some dogs eat grass, but it's not usually an indication of disease.
Dogs may graze grass for nutrition, boredom, or taste.