Today, my cats were making a ton of noise rolling around and fighting over their toys, and I yelled for them to knock it off. When they looked up at me, their "toy" ran away. Not a toy, but a real mouse. It's been 2 hours, and I still can't find it. FML
They were definitely playing! They did catch it again, ironically enough, in this little pop-up 'mouse hunt' toy tent thing. I managed to trap it and get it outside safely, though they miss their toy.