1.     Nose Prints are Unique: Just like human fingerprints, a dog's nose print is unique to them. It can be used for identification purposes and is often used by animal shelters and veterinarians.

2.     Dogs Have a Third Eyelid: Dogs have a membrane called the "haw" or the nictitating membrane, which is a translucent or white inner eyelid that helps protect their eyes and keep them moist. You might notice it when your dog is sleeping, or if they have an eye issue.

3.     Whiskers Serve a Purpose: Whiskers are not just for show; they are highly sensitive touch receptors that help dogs navigate their environment. They can detect changes in air currents, which helps dogs gauge the size, shape, and speed of nearby objects, even in the dark.

4.     Dogs Sweat Through Their Paws: While dogs do have sweat glands, they are primarily located on their paw pads. Dogs regulate their body temperature through panting, which helps them cool down by evaporating moisture from their lungs and tongue.

5.     Dogs Dream Like Humans: Studies suggest that dogs experience similar sleep cycles to humans, including the Rapid Eye Movement (REM) stage where dreaming occurs. You might notice your dog twitching, whimpering, or moving their paws while they sleep, indicating that they are dreaming.

6.     Dogs Can Smell Disease: Dogs have an incredibly acute sense of smell, which allows them to detect subtle changes in human body chemistry. They can be trained to detect various medical conditions such as diabetes, certain types of cancer, and even impending seizures in humans.

7.     Dogs Have Unique Tail Wagging Patterns: While tail wagging is commonly associated with happiness, it can also convey a range of emotions and intentions. Dogs have different tail wagging patterns and speeds that can signal various emotions such as excitement, anxiety, aggression, or submission. Understanding your dog's tail language can help you better communicate with them and interpret their feelings.