Test the dog hell, shoot it.
Extremely aberrant behavior for a pit, by the way. The breed is known for their docility and protectiveness towards family and children, unless trained otherwise by low IQ a———s who are masculinity-challenged. Someone has trained this dog to act that way, and from the way the posting reads, it was someone in that house. One can only imagine what kind of sexual deviant would want to adopt a dog like that.