Ate one with my mule and the stats appear to be: dex -5, vit +3 Duration: ? (probably 30 min)
Also, my defense went up to 17. I think the starting value was 14 or 15. There might be a slight defense boost from this also. I'll follow up w/ my original defense after the food affect wears off.
edit: The food wore off and my defense is back to 14. Does vit normally directly increase defense at a 1:1 ratio? Otherwise, this has a +defense buff as well.