Speaking of Jack Russells, one time my D-I-L was over visiting with hers. When they were leaving, they encountered my mean old Tomcat who promptly tore the Jack Russell a new one. It was actually funny as Hell.
My JRTs are cooperative hunters. I’ve seen them stalk rabbits and even seen one dog drive a rabbit one way around the house where the other dog would ambush it.
Most amazing to me is how many birds they manage to catch.