1. Get a washable carrier for both together. It might come in useful someday
in the future again. Ignore their meowing on the way - it has to be.
I would not give them any breakfast so that they don't vomit or go to the
toilet in the car.

2. Have the litter boxes ready in the new place and show them first thing
where they are. For three cats you need about three.
Let them investigate the place, and when they're ready, feed them. The 'new'
cat needs a separate bowl so that they don't fight.
The cats must stay in the apt for at least three weeks before they can go
outside.

3. Take it very easy. Let them all have their favourite places, nests, cat
trees whatever. And give a lot of TLC and treats.

Carola

 It sounds like a short trip.  The cardboard carrier would be fine, one for
each cat.  There are nicer carriers of course if you want to spring for
them.  They may whine and cry all the way or they may ride quietly.  In
general they feel more secure in a small space - the carrier.

 After you get there, keep your cats and the other one separated-in
separate rooms until they adjust to the idea that there is another cat.  The
resident cat will be most upset because it is his territory that the new
guys have come to.  Watch them when you introduce them, separate them when
your gone.  They will work out the details but it might take months - might.
 Be sure they have their own litter box, as they might not want to use the
resident one.

 Since you don't want them going out, watch the door when you use it - they
can be quite cagey about laying in wait till you open the door.  If you want
them to go outdoors, go out with them, use a leash, until they are
comfortable with their new surroundings.  I don't recommend letting cats
roam outdoors though.

 I have had many cats over the years.  Indoor and out.  I have moved with
them without problem,  Just give them time to realize the new place is home.

 > I'm moving from my apt to another place across town in a week and
 > will be taking my two cats, Dan-Dan (male, at least 12yrs old) and
 > Whitey (female, around 7yrs old) with me to a new home where there
 > is one cat (5-6 yrs old). Both my cats are 'fixed'. My cats are
 > used to going in and out of my apt, which is in a nice neighborhood,
 > and the neighborhood I'm moving to is nice also, but they might have
 > to stay out all the time now.
 >
 > So that's the situation. What I'd like is any helpful advice about:
 >
 > 1. getting them physically to the new place (my cats
 >    have never been in a car). I have a 'cat box' I got
 >    at a vet's once (cardboard box with air holes), but it's
 >    cramped and neither of my cats are going to 'go quietly'
 >    into such a thing, I'm sure. What's best way of
 >    transporting them to the new place?
 >
 > 2. introducing them to the new home - I'm worried they
 >    might run off the first thing, trying to get back 'home'
 >    and I'll never see them again. There's no chance they
 >    could find their way back to my old place, and it would
 >    be dangerous for them to try. So how to make it as gentle
 >    on them as possible and most likely that they'll adjust
 >    quickly to the new home? Should I have food out for
 >    them at the new home when I take them over so they get
 >    the idea that this is 'home' quicker? Should I make
 >    sure they're good and hungry when I take them?
 >
 > 3. how to introduce them to the new cat - my cats aren't
 >    'fighters'. (Dan-Dan would flee at the first sign of a
 >    mouse, but Whitey chases mice and birds, and has gotten
 >    into scrapes before, but not many.)
 >
 > thanks,
 > -dg