Chase killed a rat once, and this was when he was a lean 5 lbs. We lived in a very new subdivision, and were next to a field with tall grass. A field rat got in our garage. We knew it was there, and were trying to trap it. We would not allow Chase in the garage because we were afraid the rat would hurt him. Well one day, Chase slipped into the garage without our knowing. When I got home, there was blood on the concrete floor with little bloody paw prints everywhere.

I found Chase with the dead rat. He hadn't eaten it, but it was very obvious he was very proud of himself. Could not find any scratchs or anything on Chase, so cleaned him up and watched him for a few days, but he was fine.
We called him Rat Slayer for a while after that.......and we thought the rat would hurt him, guess he showed us!!