How to Adopt a Pet in Sims 4: A Complete Guide

Getting a furry (or scaly) companion in The Sims 4 is one of the most rewarding gameplay additions available — but the process isn't always obvious, especially if you're new to the game or coming back after a break. Here's everything you need to know about how pet adoption works, what affects your experience, and what to expect depending on your setup.

What You Need Before You Can Adopt a Pet 🐾

Pet adoption in The Sims 4 is not available in the base game. You need the Cats & Dogs expansion pack to adopt cats or dogs. This is a paid DLC that adds the full pet ownership system, including adoption mechanics, veterinary careers, and pet traits.

If you only have the base game or other expansion packs like Seasons or Get Famous, you won't see adoption options appear — this is one of the most common points of confusion for players.

There are also a few other pet-adjacent options worth knowing:

• My First Pet Stuff pack adds small pets (hamsters, hedgehogs, rats, etc.), but these are purchased through the Build/Buy catalog, not adopted
• Snowy Escape and other packs don't add adoptable animals
• Strays appear in the world only if Cats & Dogs is installed

So the first variable that shapes your entire adoption experience is simply: which packs you own.

How to Adopt a Cat or Dog in Sims 4

Once Cats & Dogs is installed, you have two main adoption routes.

Option 1: Adopt via Computer or Phone

This is the most straightforward method:

1. Click on your Sim's computer or use the phone
2. On the computer, navigate to Household → Adopt a Pet
3. On the phone, select the House icon → Adopt a Pet
4. Choose between a cat or dog
5. A create-a-pet style screen opens where you can customize the animal or accept a randomly generated one
6. Confirm the adoption — the pet arrives at your lot shortly after

There's no adoption fee charged through this method, which is different from real-world pet adoption but keeps gameplay accessible regardless of your Sim's financial situation.

Option 2: Adopt a Stray

If your Sim befriends a stray cat or dog they encounter in the world, they can eventually adopt that specific animal:

1. Interact with the stray repeatedly to build a relationship
2. Once the relationship bar is high enough, the "Adopt" interaction becomes available
3. Select it, and the stray joins your household

This method takes more time but lets you adopt a pet with a specific look or traits you've already observed in the world. Strays have pre-assigned traits, which can make them feel more like unique characters.

Understanding Pet Traits and How They Affect Gameplay

When you adopt through the computer/phone method, you can assign your pet up to three traits during the customization screen. These traits meaningfully change how the pet behaves day-to-day:

Choosing traits that match your playstyle matters more than it might seem. A high-maintenance household with a busy career-focused Sim will struggle with a Vocal + Playful pet constantly demanding attention. A more relaxed legacy family household might enjoy the chaos.

Household Limits and Space Considerations

The Sims 4 has a household cap of 8 Sims total, and pets count toward that limit. A cat or dog takes up one slot each. This is an important constraint if you're playing with a large family or running a multi-generational household.

Small pets (hamsters, hedgehogs, etc. from My First Pet Stuff) do not count toward the household limit — they're treated more like objects than household members.

If you're trying to adopt and the option is grayed out or unavailable, hitting the household cap is one of the first things to check.

Variables That Shape the Experience Differently by Player

How satisfying the pet adoption process feels depends heavily on a few factors that vary from player to player:

Expansion pack ownership — Without Cats & Dogs, none of the main adoption mechanics exist. Players with only base game content have a fundamentally different (and pet-limited) experience.

Active cheats or mods — Some players use mods like MC Command Center to remove household caps or expand pet customization. If you're playing vanilla versus heavily modded, the rules can work quite differently.

Current patch version — EA has patched pet behavior bugs over time. Players on older versions may experience different stray spawn rates or adoption glitches. Keeping the game updated generally resolves known issues.

Platform — PC/Mac players have access to mods and cheats more readily than console players (PlayStation/Xbox). Console players adopt pets through the same in-game menus but can't use mods to extend functionality.

Lot type and world — Strays spawn more frequently in certain worlds like Brindleton Bay (the world added with Cats & Dogs). If you're playing in a different world, you may rarely encounter strays and rely more on the phone/computer method.

What Happens After Adoption

Once a pet joins the household, it needs food, attention, hygiene, and veterinary care. Pets don't have visible need bars by default — you read their state through animations and interactions. 🐶

The veterinary system (also part of Cats & Dogs) lets you treat sick pets at a clinic or even build and run your own vet practice as a career path. Pet illness is semi-random and can add significant gameplay depth — or frustration, depending on how much micromanagement suits your style.

Whether you're building a cozy single-Sim household with one quiet cat or running a chaotic multi-pet rescue operation, the adoption system has enough flexibility to support very different approaches — but what that looks like in practice depends entirely on which packs you have, how you've set up your household, and what kind of gameplay you're actually after.