Originally posted by TalonX 
While I do believe that dogs are the product of how they are raised, and we will never know the details in this tragic case, it's more than a coincidence the rate of attacks by pit bulls. 
The family pet killing one of its own?  Incredible and sad.
 
 Either there is a higher incidence of morons owning pit bulls then other breeds, or pit bulls are just more likely to attack.
Both are actually the case in my opinion.
60% of fatal dog attacks in the USA are from pit bulls.
It's not "the owners", it's a breed raised to fight,  and years of breeding and training are not easily suppressed.
Too many morons buy pit bulls in an attempt to buy a persona, they try to compensate for their own sagging self-esteem, they want to buy something to impress others.  The results are often not pretty.
It's a tragedy so often children pay the price.