By Joseph Castro, Live Science Contributor | May 20, 2014 11:50am ET
While pet owners may have loads of anecdotal data to show that cats are smarter than dogs or vice versa, there's little scientific evidence to back up those claims.
Simply looking at the structure of the animals' brains only reveals so much about their intelligence.
Cats' brains account for about 0.9 percent of their body mass, whereas dogs' brains make up 1.2 percent of their body mass.
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