I had rats for years and kept them atop a door with a low "fence" around it. Every now and then, one would fall out..Said rats were smart enough to know the only way to get back in was to find me and sit on my foot. Once one had got out and I could not find him..Then,that night,as i was brushing my teeth, I felt my sweet rat sit on my foot. Rats never cease to amaze me. if they had a longer life span, I would still have them.

Their collective intelligence and teamwork is ridiculously good.

I had two brother rats a friend gave me who would team up to get the better of the larger male rats. It was fun to watch.