Away south, surrounded by impenetrable mountains, in the middle of an immense garden, was the great stone house of Old Emma, a nice and peaceful old lady, and her two dogs, Kobu and Lucas. Kobu was a big but peaceful and playful german shepherd who liked to sleep on the grass and feel the wind in his face when running through the immense garden, and Lucas was a small, grumpy and selfish schnauzer who liked to stay inside his wooden house, growling and barking angrily at anything that moved or sang in the garden.
These two had a bitter relationship: Lucas always bothered Kobu, stole his food and barked in his ears till exhaustion, but to no avail, however, because Kobu never bothered to bark back. In fact, he never as much raised a paw to stop Lucas from bothering him.
He seemed rather ammused by Lucas's behaviour.
One day, Old Emma's grandson asked why Kobu tolerated being treated like that and this is what Old Emma said "why shouldn't he? Lucas is to Kobu what a fly is to a bull! Oh, but just you wait, my dear; always fear the dog that doesn't bark, because if you rouse him, you end up bitten"
Oh, how right she was.
For Kobu had a very special blanket inside his small wooden house: an old and dirty blanket that has been with him since birth and reminded him of his mother before passing away. No one was alowed to use it, not even to clean it or mend it.
But Lucas, either because he didn't knew or cared about Kobu's thoughts regarding the blanket, took it and tore it to peaces while playing with it.
When Kobu saw what Lucas did to his beloved blanket, he transformed into a raging beast: his ears looked like horns, his fangs became so large they hardly fit his mouth and from his big fluffy paws came out long and sharp claws, like knives.
He bit Lucas, shook him back and forth repeatedly and threw him as far as the eye could see, making him crash against every rock and treetrunk in the path of his fall.
After this, Old Emma, hearing the commotion, went outside in a flash only to see her beloved Lucas covered in blood and bruises and Kobu in tears at the sight of his ruined blanket. She, of course, cared about her two dogs equaly, so, after healing Lucas as much as possible, she mended Kobu's blanket. Though it wasn't like the old one, Kobu felt happy about having it back, because Old Emma didn't cleaned it.
After that day, Kobu's days were happier and quiter than ever before, since Lucas, after healing, became reclusive and timid, thus never leaving his house and staying quiet, till he passed away.