here are additions EA can add to sims 4 cats and dogs

New Pet Species
Birds: Introduce a variety of bird species, such as parrots, canaries, and pigeons. Sims could interact with them, train them to speak or perform tricks, and keep them in aviaries.
Small Pets: Include small animals like hamsters, guinea pigs, ferrets, and rabbits. These pets could be kept in cages or pens and offer new activities and interactions.
Horses: Add horses as a new type of pet, with dedicated care and activities like riding, grooming, and participating in equestrian competitions.
Reptiles: Introduce reptiles like lizards, turtles, and snakes. These could be added to terrariums and require specific care, such as humidity and heat regulation.
2. More Pet Interactions
Pet Play Dates: Allow pets to have playdates with other pets in the neighborhood. Sims could arrange gatherings where dogs play with each other, or cats socialize in a park setting.
Pet Socializing and Communication: Introduce deeper communication between pets and Sims. Cats could meow in more varied ways to express needs or emotions, and dogs could bark in different tones to indicate specific feelings or desires. Sims could learn to understand these cues better over time.
Training Pets for Specific Jobs: Let Sims train their pets to do specific jobs, such as search and rescue, therapy dogs, or herding animals. This could open up new career paths or hobbies for Sims.
3. Pet Health and Care
Veterinary Care Expansion: Expand the Veterinarian Career and pet health system by introducing new types of illnesses and injuries. Sims could take their pets to the vet for more detailed diagnostics, like for chronic conditions or accidents that require long-term care.
Pet Aging and Lifespan: Introduce a more dynamic aging system for pets, where they can go through various life stages, such as kitten/puppy, adult, senior, and geriatric, with new needs and behaviors at each stage.
Pet Training and Tricks: Add more advanced training options for dogs and cats, such as teaching them specific tricks or commands (e.g., sit, stay, roll over, fetch, or shake hands). These could come with rewards or impact a Sim’s relationship with their pet.
Pet Spa Day: Add new activities like grooming sessions and pet spas, where Sims can take their pets to get pampered. This could include baths, nail trimming, and even getting their pets styled in different ways.
4. Pet Careers and Aspirations
Pet Careers: Create pet-based careers, such as Professional Pet Model, Therapy Dog, K9 Unit Officer, or Show Dog Handler, where pets (and their Sims) can participate in events and competitions.
Pet Aspirations: Allow pets to have their own aspirations, like becoming the Best Companion, Top Show Dog, or Feline Adventurer. These aspirations would offer specific goals and rewards tailored to their species.
Pet Training Skill: Introduce a new skill where Sims can train their pets, improving their pets' obedience and ability to perform tricks. The higher the skill level, the better their pets perform.
5. Pet Personality and Traits
Pet Personalities: Expand the pet traits system to include more distinct personality traits, like lazy, energetic, curious, playful, grumpy, or adventurous. These traits would affect how pets behave and interact with their environment, other pets, and Sims.
Pet Emotions: Make pets more reactive to their environment, like dogs becoming anxious during thunderstorms, or cats feeling restless when they haven’t been let outside for too long. Pets could have a broader range of emotions that influence their actions.
6. Pet Customization and Fashion
Pet Fashion: Add a variety of clothing options and accessories for pets, such as costumes, hats, scarves, or collars. There could be seasonal clothing, like sweaters for winter or bandanas for summer.
Pet Grooming Stations: Introduce pet grooming stations or salons where Sims can give their pets a bath, change their fur styles, or even give them a special makeover.
7. Expanded Pet Play Areas
Pet Parks: Introduce dedicated pet parks or dog-friendly spaces where Sims can bring their dogs for socializing and playing. These areas could have doggy agility courses, swimming pools, or fetch zones.
Pet Playgrounds: For cats, there could be specific indoor play areas with climbing towers, tunnels, and toys. For dogs, outdoor play areas with obstacles and interactive toys.
8. Pet-Friendly Housing
Pet Furniture and Items: Add a wider variety of pet-specific furniture and decor, like custom pet beds, scratching posts, cat trees, pet furniture, or dog houses. Sims could also design outdoor pet spaces in their gardens or backyards.
Pet Doors: Introduce pet doors that allow pets to freely enter and exit the house, especially useful for outdoor or adventurous pets.
Pet Hotels: Allow Sims to take vacations or work trips while leaving their pets at a pet-friendly hotel. The hotel could offer services like pet grooming, walking, and care.
9. Pet Birth and Breeding
Pet Pregnancy: Implement a more detailed pet pregnancy system, where pets can give birth to litters of kittens or puppies. Sims would need to take care of the pregnant pet, and the newborn pets could be given to other Sims or kept.
Breeding System: Allow Sims to breed pets with specific traits. Players could select specific characteristics they want to pass down to offspring, like size, coat type, or personality.
10. Pet Adoption and Shelters
Pet Adoption System: Create a more in-depth pet adoption system where Sims can adopt animals from shelters. The adoption process could involve meeting different pets, filling out adoption forms, and choosing the right pet for a Sim’s lifestyle.
Animal Shelters: Introduce a career or hobby related to running a pet shelter, where Sims can rescue, rehabilitate, and adopt out pets. The shelter could be managed as a business and include tasks like promoting adoption events, raising funds, or training animals.
11. Pet Relationships with Other Sims
Pet Socializing: Allow pets to form friendships with other pets, as well as with Sims. Pets could develop bonds with other pets from the neighborhood or from a park, and these bonds could affect their behavior and interactions.
Pet Sitter Interaction: Allow Sims to hire a pet sitter to take care of their pets while they’re at work or on vacation. The pet sitter could have varying levels of skill and affect the pet’s well-being while the Sim is away.
12. Pets in the World
Stray Pets: Introduce stray pets that roam the neighborhood. Sims could adopt or rescue them, or let them wander freely. Stray pets could also be interacted with, like offering food, petting them, or trying to tame them.