I meant take Boo to the vet. She may be sick. She may be diabetic and
having sugar swings which can induce violence - it's disorienting. And
reintroducing is a good and follow the web site's ways. Urinary tract
problems is also possible? Very overweight usually have these problems
sooner than later.

I forget. The other person said they would post that web site address
which goes into great detail as a way of re-introduction, using gated
doorways and such?

http://www.maxshouse.com/introducing_cats.htm

try that. he posts here as Phil P. your cat sounds sick. it's sudden
and she's throwing up food. i've seen 2 cats just like that before with
one very overweight and had psycho moods. she had a urinary problem,
crystals in her urine.

the cat won't hate you. cats are smart. she'll realize you are trying
to make things better. of course you may get a dirty look the first day
or two.

Ask others or Phil P. He has some good info although he gets irascible
at times. Maybe if we fed him, he'd be sweeter :)

Somebody else posted the maxhouse site so I won't dig it out. If you've
had a chance to read that, you probably already realize that they take
turns being locked up so that neither gets to feel that the rest of the
house is theirs alone. I did a schedule of, roughly, 7 hours locked-up,
7 hours out, 10 hours locked-up, 7 hours out, 7 hours locked-up, 10
hours out. The 10 hour segments were overnight, so each cat got to
sleep with me every other night. Here's an outline of what the
behaviourist suggested once the cats were comfortable with each other
at the barrier:

- Give attention and treats at the barrier so that being together was a
positive experience. (I used Kitty Kaviar and a toy that I could play
with on both sides of the barrier)

- Gradually open the barrier an inch or so that they can touch noses,
if they want.

- When that goes well, hold one cat and pet it while in the room with
the other. (I couldn't do that - neither cat tolerates being held. I
just let them out for short periods and gave lots of attention with
treats and toys, and eventually we were OK)

When they first were in the same room together, they'd still get into
little tiffs; Sukey would all of a sudden get nervous and hissy. At
first I always separated at this point, but then I learned to read body
language better and could tell when she'd let it pass, so I let it
pass. It was nerve-wracking. Finally they got so they tolerated each
other: exagerated effort to avoid conflict by giving each other wide
berth. Then they got so they'd zoom around and play at the same time,
but avoid actuall interaction, and then finally they got back to
playing with each other. The point where Sukey went right up to Riley
for a face licking was the final victory. Hope all goes well with your
cat.

The diabetes discussion is interesting. I'm a teacher and I had a
student diagnosed with diabetes at age 10. One of the key symptoms was
when this very mild and balanced child started having angry outbursts.
It makes you wonder.

Yes, and you would never put one of them at risk by putting her outside.

That's a really good idea. And,  for what it is worth, Iben likes to give
people
bad advice and upset people from what I have seen. I don't think he has any
cats.