Yes Kendo, whenever I've been up to visit family in the NE, beef only seems to appear on special occasions, and even then, it is typically only made for the men to snack on while drinking. Usually served up as a beef version of spicy pork salad (laab), but it's served raw rather than cooked, and eaten with sticky rice.
Hopefully no dog meat mixed in.
As far as dogs being able to smell whether or not you have eaten dog, I don't know, but you are right about them being able to smell cancer. In a trial a few months ago, dogs that were instructed to sniff out prostate cancer had a success rate of more than 90%. For anyone who is interested, German Shepherds were used in the trial.

Don't try to impress me with your manner of dress cos a monkey himself is a monkey no less - cold fact