IT SEEMS OBVIOUS NOW THAT I KNOW... :-)

According to a couple of dog experts, cats have more of the needed brain stuff:

Why Dogs Are Smarter Than Cats
By BRIAN HARE and VANESSA WOODS
Updated February 3, 2013, 11:25 a.m. ET
WALL STREET JOURNAL

With half as many neurons in their cerebral cortex as cats—and half the attitude, some would say—dogs are often taken to be the less intelligent domestic partner.