Without acquiring a dog from an honest, knowledgable, & reputable breeder who keeps accurate results of his dogs' pedigrees/lineage, then there is no way to know if the dog you have (especially since it came from the shelter...but kudos to you for adopting) a pure-bred animal much less one of a particular breed.
The term "pit bull" is a generic term that encompasses several different breeds & any dog that structurally resembles them. American Pit Bull Terriers, American Staffordshire Terriers, Staffordshire Bull Terriers, Bull Terriers, & American Bulldogs are all considered to be "pit bulls".
As far as the APBT, the Am. Staff., & the Saffy Bull all being the same breed, well that is completely false. The biggest misunderstanding comes from people believing that the APBT & the Am. Staff. are the same & given that each breed has been bred for completely different reasons for over 100yrs now, it is understood that they are 2 completely separate breeds. Now, thanks to bybs & puppy peddlers to breed the 2 together, we have several different "hybrids" out there. But the AmStaff is bred solely for looks while the APBT is bred (or should be bred) solely for working ability. Hence why you will see a difference in the dogs' structure. Check out
www.apbtconformation.com & look to the right & click on "height-weight". They have some nice pics of the difference b/n the ADBA APBT & the UKC AmStaff/APBT hybrid.
This is a very touchy subject with some people who still want to ride the name of the APBT for all it's historical meaning yet there dogs are nothing of the sort. However, the truth is that the AmStaff is now a completely different breed of dog than the APBT & the Staffy Bull yet all 3 remain clumped under the term "pit bull".
Since most honest people don't dump dogs at the shelter, it's safe to say that you have no idea what's in your dog's lineage. It may be that your dog has other breeds mixed in. NO ONE can tell a dog's breed by looks alone. There's no blood test to do it either (for anyone who is still spouting off at the mouth on that myth). At the most, I would consider your dog a "pit bull".
I have APBTs. I also have 2 rescues that I call "pit bulls" myself b/c no matter how much they look like one of the "pit bull" breeds, there is just no telling.
Good luck with your pup. He's a cutie.
