What if we get Werewolves and it requires Cats and Dogs?

"Sigzy05;c-17348887" wrote:
Why would it be required? They aren't connected.

Because C&D has create-a-pet, so in order to customize a wolf form for your sim (as a third form, with the hybrid form being part of the base Werewolf pack) you need to be able to access the create-a-pet features from Cats and Dogs - specifically for dogs.