Dogs are royal friends, but some behaviors couldn't understand.

1.  The dogs aren't a saprophagous animal,but they love the smell of dead animals. For example, when a dog find a dead toad or a dead mice, the dog will roll up its smell all over to show for its owner and dogs' companions.
2. Biting its own tail, not only about itching,but also just playing in circles sometime.
3. Only three colors are recognized, the dog recognizes only yellow, blue and gray. They don't watch at traffic lights when cross the street. They cross the road safety by their experiences.
4. Grinning and barking while dreaming.
5. Before feeding, you are its master.  While eating, the dog is the boss. Don't touch the dog's bowl.

 I had kept 3 dogs for many years and Thanks for having them.