Thanks everyone, I'm really going to miss him. I try not to think about it too much -- I knew the risk when I allowed him to be outdoors. I thought that because he only ever went in my yard and my neighbor's yard that he would be safe. He never once crossed the street or went passed the neighbor's house. I will have to let my neighbor know as they own his cousin (a kitten from another litter I fostered, related to Sketch). Maybe a car is leaking antifreeze or something. I just don't want to think that someone would deliberatly poison him..Thanks again everyone, I appreciate it. I will post a couple pictures for you all to see eventually.