The weirdest thing is that I honestly have no memory of a time when he wasn't here (we've had him since I was ~8), and now to have him just gone... Such a familiarity and feeling of normalcy is now simply gone.
At least it's good to know he didn't ever have to suffer much. It was really only the last day when he seemed like he was in any pain, even though we knew for a while that it was getting near the end (slower, thinner, less energetic, etc. but never really seemingly in pain). I also just feel really bad for my sister, because she's in Chicago and wasn't able to say goodbye in person or anything, and he was kinda her dog more than anyone's until she left for college/PhD.
Anyway, yeah, just kinda a sucky day. Will take a while to get used to/accept. =/