New Puppy + older cats =.......

[Taz_Zoee]

Yes, they may eventually get along, but even if they do not become the best of friends they will learn to live with each other. They will learn to tolerate each other.
I moved in with a boyfriend (years ago) with Taz and they had two cats, a mom and her baby. Taz and the baby got along great. The mom and Taz, however, NEVER "got along". They learned to stop growling and hissing at each other, but they were never "buds".
Even now, Zoee and Taz are not best friends (even as I type they are arguing), but they can live together fine.

[Catty1]

If they sleep in separate areas, you might try switching articles of bedding, so that the cats get used to the dog's scent.

As a temporary measure, you might want to try the dog/cats (ask a vet) on Rescue Remedy or Feliway(for the cats) to calm things down a bit til they get used to each other.

How long have you been back at home?