Dogs are cool critters to have around, they help make life better. My dog locked onto a rat once, and she would not ease off, she meant to kill it. I was afraid that it would take her eyes out, so I popped it with a .38 SWC. That good for nothing rat did not stand a chance, it really picked a bad place to come to.
I guess I was the one that went off like a crazed killer that time; so I can understand a Chihuahua going totally nuts. I shot the rat right in my front yard, and nobody even called the cops.