The Sims 4 With Cats and Dogs Expansion Pack Bundle
Yup. It's the whole disc and it needs to download as it's own game, but still under the same files.
If you already had the sims before, you need to uninstall it and let the new one download on your console. If you mean where on the game is cats and dogs, it is an expansion pack for the game, not a separate game. You get extra CAS items and furniture with it, as well as the ability to create cats and dogs to live with your Sim or go to Brindle Bay and adopt or open a vet clinic. So to play, you only need to open Sims 4.