Hackles raised, lips drawn back in a snarl, eyes blazing with fury. Blood pounded in his ears, nothing but rage coursed through his body. Every instinct shouted leap for the throat! 

Ears flattened, pathetic whimpers, tail tucked between legs. Fear flooded through a thin body, eyes focused only in front at the menacing shape. Every instinct whined flee!

Jeers sounded from everywhere, humans shouting their encouragement, even though the two in the arena couldn’t understand a word. Despite the loud cheers, a threatening growl rose above them all.

A shape launched itself into the air, cruel, long black claws extended. There was barely enough time for a shrill whine to escape from the opponent's lips, only to be cut off with a hurk!

Blood everywhere, staining grey fur, polished white teeth and claws, tail raised up in triumph. The crowd roared once again, some humans even standing up to clap. 

The red seemed to fade, the rage seemed to ebb away. Amber eyes, once glittering so cruelly, began to widen in horror. There was no time to think about the brutal acts that happened in this now-bloodstained arena, a chain clinked and tugged at a black, metal collar, and the wolf was lead away from his first victim. 

Oooh.  I like. :D  You are very good at this, my friend. ^^  So the plot is a fighting arena?  Or something? -tries to guess-

I'm not good at giving advice, but let me take a crack at it. P:

You are very good at timing your story and keeping in sequence.  Meaning that you don't jump over things too much and that you keep in line.  Also, your details are very good - you don't seem to really skip a beat at all.  I can pretty clearly visualize what situation the characters are in.  Your interpretation of the characters is wonderful, too.  By that, I mean you don't say something like 'Oh no.  Vorlos knew he had been tranquilized with a dart.'  Instead, you think of it like a wolf:  they don't know what the heck is going on or what a tranq dart is.  So you instead say 'a small but thin ob
ject that resembled a strange stick protruded from her neck'.  c:

Although, you should work on elaborating on their surroundings and what the characters look like.  I'm not saying that you have to go in and edit, because this seems fine now, but just make sure you explain things moderately vivid in relation to those topics later on. ^^

Thank you very much, Icey <3 Haha, yeah, I had a hard time thinking of what to do with the dart. I was like WHAT STUFF IN THE WILD LOOKS LIKE A TRANQUILIZER? -_-

And yes, I know. The first paragraph stinks :c I originally didn't want them to know they were in a crate, but the way I described it made it feel like they were in space or something xD I'll definitely elaborate, this first chapter is shrouded in mysteryyyy e_e 

the... the... the... post... eated... chapter... 3

Try writing in Word then, love. x3 Also.

When she didn't, took another hearty bite, Vorlos nervously chewed the tip off. 

That's written funny. <3 The place where you wrote 'took another heart bite' doesn't fit between the other two lines. Something along the lines of 'when she didn't collapse and took another hearty bite, Vorlos nervously chewed the tip off.'

Not sure how to put it so you still have that middle-line thing. :P It doesn't really fit the context grammatically. 

wh...wh...wh...wh...WHAT?

An Det is right. owo

Haha, plot-wise, I've just given rather similar advice to someone else: I don't like animal stories. Mainly because I think that people fail to bring out the animal in the story, what I'm reading doesn't feel like wolves to me. The names and everything don't feel wolfish, if I had to imagine talking to wolves I'd imagine a lot of their names to be round and low with little sharp sounds for example (it's a bad example though haha). Heck, I would have even liked it if you followed Oppel's tactic and made it so all the wolves couldn't see colour (dunno if they're colourblind though). But I have a persona vendetta against those sort of stories though xD so don't take my word for it.

Your writing style int he prologue is poetic but awkward. The constant repetition of structure in the paragraphs sort of lost the effect you wanted to go for me thinks and I personally think it's too short to be more enjoyable.

I think you need to be more deive though! Haha, it's good and all but I think I don't get such a strong impression of their setting. It's still aright though. 'flapping tree' would sound weird, they may have felt it resembled a tree or even recognised it as an image of a tree.

Overall I think you're going too quickly and there's too little words to explain it all xD; it's still a good effort and while I'm not one for these sort of stories, I'm sure there are others that are more appreciative.

Haha, don't give up with it though! c:

Unless you can't go anywhere with the plot. idk. But still don't give up!