Angie - thanks for the good thoughts on Beau. Yes, he's had symptoms including wobbly legs, pale gums, lethargy, etc. He's also peeing a lot. it's not diabetis, so we are checking tomorrow for a common dog ailment, cardio myopathy. I'll keep you all posted on tomorrow's findings.
Barbara B - I believe the dogs that last the longest are mutts! Boxers, unfortunately, seem to average 7 years (although I know some folks that have had boxers for 13-14 years, but these are usually the European breed of boxers (they are shorter and thicker than ours, which are American boxers).
5'3" ... 54 years young