One other point about dogs; I understand that they don't sense pain the way humans do (especially when aroused), and they certainly don't know that they are supposed to flop over when shot. So if the dog is in "fight" mode, don't expect it to stop until it is DEAD, or so many bones have been broken it cannot move, though the fighting breeds are likely to keep trying, so stay out of biting range.
Also, as calibers are discussed, keep firmly in mind that handguns (even the big bores) are WEAK, in the absolute sense. The .45 has about the energy of a pitched baseball.
Powder smoke- The Smell of FREEDOM!
I don't shoot to kill; I shoot to live.