This is a story which is slightly similar to "Warriors" by Erin Hunter, but was developed on a server in book form, but since text is easier to work with, i plan to continue it here.

"Whats going on?" I squealed. My mother picked my up by the scruff, and sounds of battle could be heard from outside the den.
"We have to go." The reply came.
"Where's daddy?" I wailed. Mother paused.
"He went off... to fight..." I didn't know much at that age, but I could grasp that there was an evil spreading through the forest, corrupting its inhabitants.
It made you foam at the mouth, and your eyes turned to a pupiless, cloudy, scarlet. Your fur becomes ragged and matted, and it blackens to the hue of the night. Once it gets inside, it uses whatever it can to make you function.
It will walk even when the paws are raw and bloody, even when the bones sticks out. They have no morals, they feel no emotions. Especially not pain. I knelt down to my mother, muzzle to muzzle.
Then, she sang. Despite all the battle she SANG! She sang the song of our people, she sang clearly, clear as the moon on a cloudless night. As the last note resonated off of the hollow's stone interior, I looked into her eyes. They were a sharp, crystal green just like mine. Familiar, yet mysterious ; Old, yet still young with life. She picked me up once again. The cries from outside had not ceased.
"Come on, we have to go," she whispered as she pushed aside the mossy entrance. The bright sun blinded me as her speckled legs swiftly carried me through the battle. Her heavy exhalations told me that she was willing to
spend her last breath ensuring my safety. We traveled so fast, that all I remember is the scent of blood drenched grass, and powerful screeches. Some of triumph, but mostly pain. Near the edge of our camp, a black wolf charged at us. Mother leaped at it and slashed it's throat. Its head snapped, and slowly tore open. Finally, it dropped the head, still snarling and making guttural noises. A aura of darkness encircled my mother, then swooped inside her mouth.
she rolled on the ground, seething in pain. I was petrified as the corruption visibly spread from her head to her tail, her eyes rolling until they filled with a emotionless, hazy scarlet. I vividly remember her last words. "Dont look back, just .. run."