"A friend " may be getting two pups in the future and was wondering about the most suitable way to introduce them into a household of cats.

This "friend" was thinking of setting up a spare room for the barking babies and taking time off work to help them settle into their new lives.

The "friend" was going to keep them away from the cats until they are bigger and more confident, and introduce the cats one at a time in a supervised setting (oh, and trim the cats' claws of course ). Do you have any other advice???