The Benefits of Having Multiple Dogs: More Fun, More Companionship—and a Little More Planning

There is something special about a home with more than one dog. The shared excitement when you pick up the leads, the games in the yard, the quiet companionship when everyone settles down at night—it can be incredibly rewarding for both dogs and people.

But adding a second dog should be a thoughtful decision, not simply one made because your first dog looks lonely or because two puppies seem like they will entertain each other. When the timing, training and personalities are right, a multi-dog household can be brilliant. When they are not, it can create far more work than people expect.

Social companionship may support healthier ageing

One particularly interesting finding from the Dog Aging Project looked at social and environmental factors in more than 25,000 companion dogs. Dogs with stronger social support—including living with other dogs—were associated with better health after accounting for age and weight.

That is a fascinating result, but it is important to state it accurately: this was an association, not proof that simply buying a second dog will make a dog live longer. A second dog is not a longevity guarantee. What the research does reinforce is that dogs are social animals, and positive, appropriate companionship can be an important part of a healthy life.

For many dogs, a well-matched companion means more play, more stimulation, more routine and another familiar presence in the home. For many owners, it means twice the laughs and a very full heart.

The best time to add a second dog

My advice is not to get two puppies at the same time. Ideally, wait until your first dog is at least 12 months old, has been properly trained and has developed some independence before adding another puppy.

Two puppies do not make puppy raising easier. They usually make it harder.

People often call this littermate syndrome or leader syndrome. The label is less important than the real-world issue: two young dogs can become overly dependent on each other, struggle to focus on their owner, encourage each other’s bad habits and become distressed when separated. This can happen with siblings, but it can also happen with two unrelated puppies raised together.

Instead of one puppy to toilet train, teach to settle, socialise, walk, recall and build confidence in, you have two puppies needing all of that work—often separately. It is not half the work each; it can feel like more than double.

If someone does choose to raise two young dogs together, they need separate pens or crates, separate training sessions, separate walks and individual outings. They need to learn that being apart is normal and safe. They also need plenty of one-on-one time with their people. For most families, waiting until the first dog is mature and well trained is the far more sensible option.

Older dogs can be wonderful teachers

One of the great advantages of adding a puppy to a calm, well-trained adult dog is that the puppy can learn from a very good example.

I use my older dogs in training all the time. When I take a puppy walking near a busy road or down to a café, having a calm adult dog alongside us can make a huge difference. The puppy sees the older dog walking nicely, relaxing around noise and people, and taking the world in its stride. Puppies often copy that calmness.

That does not replace training. The puppy still needs to learn to listen to you, walk independently and cope confidently without the older dog beside it. But a sensible older dog can help show a puppy what calm, appropriate behaviour looks like.

Personality matters more than sex

People often ask whether a male and female, two females or two males is the best combination. In my experience, there is no single answer. I have had all combinations, and the success of the pairing came down far more to the individual dogs and their personalities than their sex.

Look for compatibility in energy level, play style, confidence and tolerance. A boisterous, relentless young dog can be too much for a very placid older dog. A dog that likes quiet personal space may not enjoy a puppy that wants to play every minute of the day.

I had a perfect example of this with Nessie, who is an exceptionally calm and placid dog. I brought home a little Jack Russell puppy to be a more alert guard dog around the house—because Nessie is so friendly that she will happily run up to greet anyone who arrives.

The Jack Russell adored playing. Nessie did not share his enthusiasm. He drove her absolutely mad, and she ended up taking him through a hole in the fence to the neighbour’s property—about two kilometres away—and leaving him there. She did it three times because she had simply had enough of him annoying her.

It was funny in hindsight, but it was also a good reminder that a mismatch can create a real management issue. A young puppy wandering through a fence is not something to take lightly. Nessie was not a bad dog, and the puppy was not a bad puppy; their personalities and needs just were not a natural fit.

Same breed or different breeds?

There are wonderful mixed-breed households everywhere, and there is certainly no rule that dogs must be the same breed to live happily together. Personally, though, I have found that dogs of the same breed often get on particularly well. They tend to have a more similar communication style, play style, energy level and idea of what is fun.

That does not mean a Golden Retriever cannot live beautifully with a Jack Russell, Poodle, Labrador or any other well-matched dog. It simply means the fit needs to be considered as an individual pairing rather than assumed.

Keep both dogs as individuals

The biggest mistake in a two-dog household is allowing the dogs to become a single unit. Both dogs need their own relationship with you, their own training, their own downtime and their own confidence.

• Feed separately, particularly if either dog values food highly.

• Give each dog a separate bed, crate or quiet area where they can switch off.

• Train one-on-one, especially through the first year with the new puppy.

• Take individual walks and outings as well as walks together.

• Protect the older dog’s routines and one-on-one attention.

• Supervise play and step in if one dog is repeatedly chasing, pinning, pestering or overwhelming the other.

• Avoid forcing friendship. Calm coexistence is a success; not every pair needs to be inseparable.

The resident dog should not lose their place in the family just because a cute puppy arrives. Keeping their routines, affection and boundaries intact helps prevent jealousy and allows the new puppy to settle in without turning the household upside down.

The bottom line

Having two dogs can be a huge amount of fun. A compatible companion can add play, enrichment and social connection to a dog’s life, while giving the whole family more personality and enjoyment every day. The research into social support in dogs makes that an even more interesting conversation.

However, the answer is not simply “get another dog.” The right answer is to get the right second dog at the right time. Let your first dog mature, train the new dog as an individual, protect each dog’s space and choose based on temperament rather than a formula about sex or breed.

Do that well, and a second dog can be one of the best decisions you make.

Research note

McCoy BM, et al. (2023), “Social determinants of health and disease in companion dogs,” Evolution, Medicine, and Public Health. The study found social support, including living with other dogs, was associated with better canine health—not that a second dog directly causes a longer life.