Keep one wolf and one cat as a pet. Let me know which challenges you for leadership status first.
Excuse me while I go and pay homage to our larger-brained whale overlords. While I'm doing that, you might want to take a look at a dictionary. Specifically the word "domesticated."
All domesticated animals have smaller brains than their wild counterparts. The Domesticated Silver Fox, which was created by the Soviets after decades of breeding, lost many of the characteristics of their wild counterparts. It would seem that domesticated animals do not require the intelligence of their wild counterparts. No one is going to keep an animal that will challenge its owner for leadership.