Hey, what was that?!?

I was taking a break and just listening to the wind in the still bald trees when all of a sudden Bella stood up. As soon as I got my camera on I took 3 pictures right after another. In the 1st one Bella is just taking off towards the log pile (there are a few critters that are using that space for the time being and Bella LOVES little critters). Picture 2 is Bella almost reaching the logs in the few seconds it is taking Bo (bottom left corner) to scramble to his feet and move. And picture 3 Bo arriving to help Bean investigate the myriad of fuzzies that have escaped them. Man are they fast, I don't know how the little mice escaped them.