I am so sorry for you and your friends loss. Thats terrible, but I heard that pit bulls have it in their nature/genes to attack. I dont trust them, because even under the most loving and attentive care, they can still turn aggressive. I have a siberian husky at home, and I was told they are terrible with cats, but Bjourne has never tried to hurt them. And I will tell you, he does not like pit bulls. Hes always on the defensive when one is near. I am sure the pitt bull took the bark as a instigated fight, and lashed out, but its terrible to see a siberian husky as large as they are literally ripped to shreds by two dogs, and once a pitt bull has tasted blood, I think thats it. And with the child and the cat, the best thing was to put all 3 down. I am so sorry for this. I hope that the kitten helps, and I hope that in time you guys can heal.