The cat picture (Sparky) is courtesy of janoid
The main function of the cat teeth is to kill and to cut down his pray.
The technique our little pets are using in order to kill their pray, is to insert their teeth between two of the pray neck vertebras and separating them with force…!
There are scientist who thinks that the gap between the cat teeth match the size of the pray neck's size. Yes you are right the gap between the teeth of your cats is exactly the size of a house mouse neck!