Demon Kitty

One of the new kittens at my son's house is a demon. I mean it really is.
If it bumps up against another kitten it will try and rip that kitten to
pieces. If one runs over it when trying to find a feeding station, woe be
to that kitty.

They are trying to isolate it and let it feed by itself but that is a job
and to keep it warm and all just being such a new kitty. Anyone ever had
this or have any suggestions? It isn't playing, it goes for the jugular
every time.