alive and it's not a human or another dog, he wants to kill it. Squirrels, rabbits, lizards, birds, snakes (including a coral snake a couple of weeks ago), rodents, toads (even though they make his mouth foam like crazy), and my neighbors chickens (which he was letting live in his back yard without any kind of chicken coop or anything). He's gone after deer, skunks, a fox, and a turtle but wasn't able to secure the kill.
And once he finishes his murder, he just walks away and goes on with his life like it never happened.