No offense, your post put a smile on my face. Our dear Miss BooBoo Kitty(RIP), behaved the exact way!!! Not so much the growls and hisses as other cats walk by, but Boo was notorious for giving ALL the other cats in our house the whack to the back of the head!!!! I think it is just your cat's personality. If it helps to know, Boo did mellow a bit as she got older, but she continued the whacks to the back of the head until the day she went to the Bridge!!! I do not think Lake is like this because she was raised by humans, I think it is LAKE!!