Interesting dog facts (1)

Dog is one of my favorite animal. I have two dogs. The types are terrier and yorkshire. I like to play with them. I think they have became my best friends:D
Now, I want to share some interesting facts about my favorite animal. I will write 5 interesting facts about dogs/day. (It is better than if I write more than a hundred at once. Isn't it?!)

1. It is a myth that dogs are color blind. They can actually see in color, just not as vividly as humans. It is akin to our vision at dusk.
2. Dogs DO have better low-light vision than humans because of a special light-reflecting layer behind their retinas. 
3. A German Shepherd guide dog led her blind companion the entire 2100 mile Applachian Trail.
4. If never spayed or neutered, a female dog, her mate, and their puppies could product over 66,000 dogs in 6 years!
5. Dogs’ only sweat glands are between their paw pads.

Just wait another posts to see another facts....

German Shepherd