cheer up bro, this is part of life. all living things will have to go someday. till date i lost 5 dogs. some due to old age, some due to sickness. end of day, as long as when he/she was alive, n u guys had a happy time together, it good enuff to have sweet memories. sometimes letting them go is a gd thing actually. stop them from suffering. dogs r very much like humans actually, when they hit a certain age, they will get all kinds of sickness. i actually put a few of mine to slp as vet say it more kind to do that.