Cat vs Squirrel - who wins?

[cbelt3]

My youngest son's Chihauhua, "Izzy" is a stocky little girl with legs that are shorter then her body is wide. And yet, for some odd reason, she caught and killed two squirrels in our fenced in back yard this summer. We still don't understand how she did it... pretty much all the other dogs seem to be faster than she is, especially the long legged Rat Terrier who wins the 'dog chase' games every single time.

And she NEVER catches the 20 toed cat that lives in our house.