This appalling Beast is known by many names, "Cat Eater" being the most prevalent. Humans will turn into raging monsters while under its influence, sucking up all the carefully shed cat hair and terrorizing the feline residents with evil glee. All you can do is run and hide.
Occasionally, the humans are forced to open the vacuum cleaner and remove a swollen bag from within. This is its stomach, and must be destroyed at all costs. Do not worry if the human yells at you, for the yell is really that of the Beast in pain.