Honestly, its easy to be smarter than lower percentile people as an animal just because your intelligence isn't being blocked by higher order thinking and emotions to the extent that humans are.

A full force no-function autism guy has an IQ on par and above probably a lot of animals, but because of his "more developed" brain he loses many basic instincts and ability to properly react to stimuli due to a failure in the computer that animals just don't have.