Consider These 15 Factors Before Adding a Second Dog to Your Family

Thinking about adding a second dog to your family? As someone who’s done it (and helped others do it too), I can tell you—it can be one of the most rewarding decisions you make. But it’s also a big one, and there are a few key things you really want to think through first to make sure it works for everyone involved—especially your current dog.

Here’s what we’ve learned from experience:

1. Space: Do You Have Room for Another Dog?

Before anything else, ask yourself if your home can handle two dogs. When we brought home our second pup, we realized quickly that having enough space wasn’t just about square footage—it was about giving each dog their own safe, comfortable spot. This could mean a second crate, an extra bed, or even just a quiet corner where they can retreat when they need a break.

And don’t forget outdoor space. If you’ve got a high-energy breed, a fenced yard or regular access to open areas for running and sniffing is a must. Tight living quarters plus two dogs who need room to roam can lead to stress—for everyone.

2. Time & Routine: Can You Handle Double the Care?

Two dogs means double the time, especially in the early days. Training, walking, feeding, grooming, vet visits—it all adds up. When we added a second dog, our daily routine shifted. Walks took longer, feeding needed more supervision, and training sessions had to be one-on-one at first to avoid chaos.

If your schedule is already packed, think hard about whether you can consistently carve out that extra time. Dogs thrive on routine and attention, and they’ll notice if they’re being shortchanged.

3. Temperament & Energy: Will They Get Along?

This one’s huge. Even if your current dog is a sweetheart, that doesn’t mean they’ll automatically love a new sibling. Think about your dog’s personality—are they dominant or shy? Do they love other dogs or just tolerate them?

We’ve found that matching energy levels and temperaments makes a world of difference. A mellow senior dog probably won’t appreciate a bouncy puppy constantly in their face. On the other hand, two high-energy dogs might get along great—if you can keep up with them.

Tip: If your dog is dominant, consider a more submissive second dog, and vice versa. And always introduce them on neutral ground first before bringing the new dog home.

4. Finances: It’s Not Just Double the Food

Adding another dog means double the essentials—food, vet care, grooming supplies, toys, preventatives, and maybe even training classes. But it’s the unexpected costs that can really catch you off guard: emergency vet visits, behavior issues, or special diets.

Before committing, make sure your budget can handle not just the basics, but the curveballs too.

5. Age & Size: Will They Be a Good Match?

Consider the age gap between your dogs. Puppies have endless energy and can overwhelm older dogs. When we had a senior and brought home a puppy, we had to be extra mindful of giving our older dog space and rest.

Size matters too. A large dog can accidentally hurt a much smaller one just by playing. Try to choose a dog whose size and play style won’t be a mismatch with your current dog.

6. Training & Socialization: Ready to Start Over?

Even if your current dog is perfectly trained, your new one probably won’t be—at least not at first. Expect to invest time in basic obedience, potty training, leash manners, and helping them adjust to your home and routines.

Also, think about socialization. If your new dog hasn’t been around other dogs or people much, you’ll need to work on that. We've found that structured introductions and short, positive experiences go a long way.

7. Lifestyle Fit: Does a Second Dog Make Sense Right Now?

Take a step back and look at your life overall. Do you travel a lot? Have a new baby or a busy job? Are your kids ready to handle the responsibility?

A second dog isn’t just a pet—it’s a long-term commitment. Make sure it’s something everyone in the household is on board with.

8. Where You Get Your Dog Matters

Whether you’re adopting from a shelter or working with a breeder, do your homework. Reputable rescues and breeders will help you find a dog that’s a good match for your home and lifestyle—and they’ll be honest about any health or behavior issues.

Rescue dogs can be amazing companions, but they sometimes come with unknown histories. Be ready to invest time and patience if you go that route.

9. Gender Can Play a Role

We’ve found that opposite-sex pairings (male + female) often have fewer dominance issues than same-sex pairs, especially with unneutered dogs. Of course, every dog is different, but it’s something to keep in mind when choosing a second dog.

Final Thoughts

Bringing home a second dog can be a beautiful decision—but only if you’re truly ready. Take your time, be honest about your lifestyle and your current dog’s needs, and make sure you’re setting everyone up for success.

When it works, it really works. There’s nothing quite like watching your dogs become best friends—and your family growing in the best kind of way. 🐾