My Lab, Sadie, has been on the barf diet since we adopted her at the age of
8 weeks, and she usually drinks just after eating.  She does not, however,
on a daily basis, drink as much as my former dogs, who were fed frankenfood,
aka dog chow.  BTW, she runs miles at a time, along with us while we are on
our four wheelers here in the AZ desert during the winter.  Her energy
levels are amazing, and I am convinced it is due to her diet.  She is still
young, age 3, but her stamina seems to be improving with age.  Oh, how I
wish I had raised my kids on the paleodiet.  I am fortunate that they are
all three eating low carb (they are all in their 30's/40's) and one is
leaning closer to the paleodiet.
Jan in AZ