my cat is a complete nutter. In a morning he hangs on the little lip of our door staring up at us through the little window as much to say " well let me in then" the neighbors must have a right giggle at him.
Last summer we were sat in the garden and a staffi dog came in from no-where and was tormenting my dog. From out of no-where my cat dived on the staffi and started kicking it's head in (( so comical to watch)) the staffi didn't know what was going on!! it ran off down the back alley, and the cat sauntered off as much as to say "come back if ya dare"
I don't know about dangerous dogs.....I have a dangerous cat. Even our dog will move out from under the warm fire to let the cat lie down