Cats can swim.
But they don't like to.
Most do everything they can to avoid it.
But occasionally a cruising cat will fall overboard. Travis the cat fell in about 35 times before we stopped counting.
So far Charlie hasn't even gone near the edge. But we know that on some dark night a flying fish or a giant moth will lure him overboard.
We want him to know how to rescue himself when the time comes.
And while this may just look like a fun thing to do to a cat, it's really for his own good.