It introduces one of the most fun and engaging careers yet – veterinarian. The deep bonding, training and care-taking gameplay makes pets feel alive. With robust create-a-pet options, breeds, coats, traits and more, you can design a perfect pet for your Sims. You‘ll get to create, customize and care for furry friends like never before. Key Reasons to Add Cats & Dogs to Your Game: This highly immersive pet gameplay adds immensely to the base Sims 4 experience. As a longtime Sims fan and pet lover myself, I can confidently say that the Cats & Dogs expansion pack is well worth the $40 price tag.