Why did you get a dog?

We had this happen when we got Lady our last dog.  Spot took a fit and
wouldn't come down stairs.  She had water and a litter box up there to use
by I didn't give her any food.  Miss grumpy pants got over being pissed
about the dog when she got hungry enough.  Now the two are best buddies.

I would put the cat food back where you always kept it at and just give her
a couple days.  You'll find she'll probably sneak down to eat once everyone
is in bed and as she gets more comfortable will start coming out more and
more.

Celeste

How recently is "recently"? My cats took months to adjust to a dog in the
home.

You DO crate the pup at night so the cat feels safe then, right?

And you DO have a baby gate that the dog can't get over/under/thru to divide
part of the house so the cats have a way to get away and a way to get close
if they're curious without getting TOO close, right? And the cat food, water,
and litterbox is on the side of the gate that the dog can't get to, right?

You can't expect a 4 or 5 year old cat to just accept a dog in the home
without having some adjustment time. The adjustment time is highly dependent
on the cat. Some adjust very fast, some take months, even a year or more
(esp. if what they don't like is the hyper puppy-nature). A few cats never
adjust if they weren't raised with dogs.

The cats were there first. You need to make allowances for them and teach
your dog to respect the cats' space. Especially since it's a terrier. My
terrier mix (14 months old) finds it quite fun to try to chase cats (or
anything small and moving) and was a bear to train NOT to. She still tries
sometimes, but she stops the second she's told and there is a gate in the
hall that divides my home so the dog can't harass the cats if they want to be
left in peace. And the dog is confined in the kitchen when I'm not home, so
the cats get free roam of the house (and still-kind-of-a-puppy accidents
happen on tile LOL).