Why Boxer dog's die young

Good thread...looks like I'm getting here a bit late. I had a boxer puppy...Baxter...last year that was only with me for a couple of months. One day he was acting strange and had some diarrhea so I took him to the vet. They did all the blood work and tests that would rule out viral/bacterial/etc issues and put some fluid under his skin. After I got him home he continued expelling "fluid" from both ends. He got really weak so I took him to an animal hospital and he was so dehydrated they were unable to do anything for him. I only had him for a short while, but I was in pretty bad shape that night :(

Here he is with my Boxador (boxer-lab mix) Charlie (she's a girl).