#8. Hear better than you
Puppies are born deaf but very soon they can hear better than their humans. While humans can hear sounds from 64 hertz too 23,000 hertz, dogs can hear four times more than that -67 to 45,0000 hertz (cycles per second).
#9. Curling up
The reason why dogs curl up while sleeping is to warm themselves and protect their vital organs while they sleep.
Not all dog breeds bark. The Basenji is the only breed of dogs that doesn’t bark but they can yodel which is quite fascinating.