Damn dude...that is rough. Your dogs can become some of your best friends I know...thus the 'ole saying. I know your pain, my dog (a huge chocolate lab) grew up with me when I was a teenager. Until one day he got trapped inside our kitchenette room (somehow the door closed behind him) outside by our pool where he stayed. Being it was a typical Texas summer day, he died from heat exhaustion and we found him on the floor. Sad thing is he had tried to jump out the open window above the counter, but he was so big (120+ lbs.) he couldn't make it all the way. You just have to try and forget the nature of the death, and remember the good times. I'd have to agree with your decision though...you did the right thing.