I wondered why the volume of growling, hissing and cat-to-cat-contact
had suddenly gone up last week and I realised why - she's irresistably
attracted to movement (especially twitching tails!) And since the
other two cats are used to her they're more relaxed in her presence
and they're not immediately chasing her from the room - so Silver
might be lying there peacefully with her tail dangling over the edge
of the bed, and next thing you know, there's a black kitten attached
to it! Tessie will also come up to Silver on a regular basis for a few
rounds of catboxing, or a game of chasey... Silver puts up with it for
a little while but then she gets tired of it, and Tessie doesn't take
a hint easily, hence the alarming degree of noise.

Another favourite game of Tessie's is to hide under the bed and to
pounce out at anything that she sees moving past her - especially
toes. It's cute, but I'll be happy when she grows out of it because I
always have bare feet inside! Scouty and Silver were a good few months
older when we adopted them and they were a lot less aggressive in
their play...