When I want a cat to know that it shouldn't do something the most I have to do is stomp the ground near it and shout "Hey!" or "Oi!" or something similarly loud and aggressive and it'll run off and never do it again. Manhandling an animal just because it was doing something you didn't particularly like is NOT a reasonable response in any way, shape or form; responding in such an aggressive manner to anything as minor as "cat was stealin my dogs eats!!1" is a clear sign that you have problems responding appropriately to a wide range of basic situations.