The thing that the humans didn't know about the squirrels, cute and fluffy and entertaining though they might be, were always trying to take over the world. The dogs and cats had caught onto this twitchy nut-eating megalomania decades ago, and did their best to thwart the scurrying little hell demons at every turn. Many saw it as a solemn quest, especially among the dog tribes. It was their honor to serve their people by removing this scourge from the neighborhood. Most of the cats took a differing approach. If the squirrels were getting attention, then they were not.