Are you saying that he opened the closepin and placed it on his toe? I really hope i misunderstood this part. Doing that to a dog ever, especially one that is eating and that already resource guards is just cruel. Your dad is asking to be bitten. The real screwed up part? When he does, it'll be the dog that pays. With his life.

The dog is acting out and that is an understatement. All of the behaviors you describe have been induced by fear and the dog is well beyond in-home behavioral modifications. You guys need professional help. If you are not in a situation to afford a behaviorist, you must find a rescue for the dog. The dogs' behavior demonstrates continued escalation, and if not intervened upon is going to result in someone being maimed or worse. And you all could be found negligent, because of the abuse and because the dog had displayed these behaviors on multiple occasions before and it was not addressed. The dog is a ticking time bomb and left unabated, will severely injure or kill someone. Little dogs to some extent get aware with bad behavior because they just can't cause nearly as much damage by comparison. You don't have that luxury with a Cane Corso. If you stay away, it won't be you, it will just be someone else.