I added an animal into my scene, with slightly different behavior than the humans. For one thing, he is a little skittish, moving around a lot more. For another, his movement speed is much higher. The extra fun thing about having a high movement speed is you find bugs you never would have known about. The pathfinding for the fox kind of broke everything, so I've spent a lot of time making the different movement speeds work well together. It's a little painful but it will pay off in the end. I hope.