The dog is up to no good in this picture, he clearly wants to nibble on his little friend's face and extinguish his light from his miserable life. But just as he's about to bring his plans to fruition, the owner steps in. And the clever canine knows that his master doesn't want his cat to get injured by his jaws. This rivalry between canines and felines will continue until a meteor knocks both of them into extinction.
As the owner enters inside, the dog's reaction immediately changes into that of love. He begins to lick the cat's face furiously in the hopes that he can get away with being disciplined by his owner. This is what the dog knows about his cat friend, "Cats are friend, not food and if you eat them up, there is bound to be trouble headed your way."