I'm taking the other side....Pits can and are wonderful dogs. But they do present special challenges. They are in the terrier group. Research terriers as a whole. As with any group pits were bred to do certain things. Bad breeding and BAD OWNERS have made this a very demonized group. If you want to see a success story go to Best Friends Animal Sanctuary's website. They are the group that rescued and rehabilitated Michael Vick's dogs. Also spaying is one way to reduce any type of aggression. Obedience classes are great. Cesar Milan has good advice too. You can Google him. Food aggression is normal to any breed. That's going back to their wild roots. Remember these are animals. PEOPLE put human personality traits onto them.
I don't deny that they can be dangerous. But so can any other breed. In previous generations it was the Doberman or the German Shepherd.
I personally know of 2 pits that are therapy dogs and allowed into nursing homes. And they don't wear muzzles. AND law enforcement is using these dogs as search and rescue, drug detection and tracking dogs. And not all LE dogs are aggression trained, so they aren't looking to the breed for that. All dogs need a job.
You've done a good thing by rescueing this puppy. Give it a chance. Education is your best resource.
the best to you and your family......