My daughter has a BA in Animation and Graphics so I get to see and look at a lot of animation!
I rather like this style of animation, and I
love the cadence of the characters voices, the animation itself is very well done, especially for a first attempt. It's quality.
Like other posters mentioned, they storyline lost me a little bit and I heard a lot of Mike Judge and Trey Parker influence in it
I don't think the voices could have been any better, you nailed that, the sound effects are great, I like artwork and character style, the fox and rabbit are a cool concept. I think you could tone the subject matter down slightly (a little more wit, a little less vulgar) and work on the story line a little bit. But over all... this is really really nice work and I know this was NOT easy to put together.
And wow, what a weird coincidence... I just visited your profile, you and my daughter who I mentioned above have the same birthday! LOL. Happy B-day a few weeks early! (she's 7 years your junior though. haha)