There's not a lot to say to this. It's awful and miserable, but that dog died probably the most peaceful way he could--not riddled with bullets or split with lasers. Yeah, the only thing that would have been better would be if Neil had been with him. But only that.

"You're wrong on a little bit, though," he says after a moment. "He's not your only family. And you weren't his only family. Me and ED-E... We loved him, too, you know."