Need help with dog adoption!?!?

I'm adopting a dog soon, and there is currently a rottweiler in my nearest shelter, he is playfull and energetic, i got hooked, but im afraid he will turn out to be a complete wreck... im not sure if he is a pure bred or a mutt... and ive heard from several sources getting rottweiler mutts can cause complete... show more I'm adopting a dog soon, and there is currently a rottweiler in my nearest shelter, he is playfull and energetic, i got hooked, but im afraid he will turn out to be a complete wreck... im not sure if he is a pure bred or a mutt... and ive heard from several sources getting rottweiler mutts can cause complete chaos because of their inestability... i would appreciate some advice...also im no dog expert but he looks pretty purebred... if you could look at these pictures maybe give me some input on your opinion...http://www.petfinder.com/petdetail/22429143
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