I wouldn't want to, but since I'm sensitive to sounds it might eventually feel like torture and I might decide to kill it. After all, a dog that barks all the time isn't probably a happy dog. I would sedate it first and then cut its carotid arteries.
If time travelling was possible and you were to travel back in time to kill Hitler before he kills/has anyone killed, and in the last minute you found out that he is your great-grandfather and there would be a 20% probablity that if you kill him, you will not be born and he will survive, would you cancel the whole thing or take the risk of failure?