Yes.
if you are asking how invented the cat flap then sir Issac newton invted it
Yes
Isaac Newton invented the cat flap.
According to Wikipedia, there is uncertainty as to whether Sir Isaac Newton did invent the cat flap (British English first for once in honour of Sir Isaac) or kitty door. See: http://en.wikipedia.org/wiki/Cat_flap#History
he ivented it in 1683 i think
Sir Isaac Newton wanted to invent cause pablo the putty cat told him to blow up china.
Sir Issac Newton it was actually a CAT door-more a flap than a door
Answer:Yes a cat can have a cat-flap but the cat will most likely not use it.
Yes and no.
A cat flap is at the bottom of a door and it is used for cats to get in and out of the house instead of having to open the door every time.
Have someone hold the cat near the flap. You go outside and call it or peek at the cat through the flap. You could also put your hand through the flap and wiggle your fingers. Cats are pretty smart and it will learn fast.
If the cat is very territorial, he probably wouldn't like it. If he is friends with the cat(s) that is (are) using his flap, he would most likely be fine with it.