Bringing Home a Second Puppy: Training Two Dogs at Once

Training one puppy is a full-time job. Training two at the same time is not double the work. By most trainer estimates, it is closer to triple. Two puppies means two separate training schedules, two separate socialisation programs and twice the vet bills, all while making sure each dog bonds with you rather than becoming exclusively attached to the other.

That does not mean it cannot be done. Plenty of Australian households successfully raise two puppies or add a second dog to a home that already has one. The difference between chaos and success comes down to structure, individual attention and knowing about the risks before they become problems.

If you have two puppies or plan to bring home a second dog, the single most effective strategy is to train each dog individually before working them together. Separate crates, separate walks, separate training sessions and separate socialisation outings are non-negotiable. This prevents over-bonding (sometimes called littermate syndrome), builds each dog’s confidence independently and gives you a stronger relationship with both. The ideal gap between puppies is twelve months or more, but if you already have two, the plan in this guide will help.

Why Most Trainers Recommend Against Two Puppies

Before getting into the how, it is worth understanding why the advice from virtually every professional trainer and reputable breeder is to wait. The reasons are practical, not theoretical.

Two puppies that spend the majority of their time together will naturally bond more strongly with each other than with the humans in the household. They become each other’s primary source of comfort, play and security. That sounds sweet until one of them needs to go to the vet alone, or you need to leave one at a boarding facility while you travel. A dog that has never learned to function without the other puppy can spiral into genuine distress.

Training also becomes significantly harder. When both puppies are in the same room, they feed off each other’s energy. A calm training session with one pup turns into a wrestling match the moment the other is present. Housetraining is trickier too. Two puppies in the same pen after an accident makes it impossible to know which dog did what, and timing is everything with toilet training.

And then there is the cost. In Australia, the first year of a puppy’s life typically involves multiple vet visits for vaccinations, desexing and health checks. Puppy school runs around $150–$250 AUD per course, and each puppy needs a separate course. Food, toys, crates, leads and bedding all double. An honest budget for two puppies in the first year can easily exceed $8,000–$10,000 AUD combined.

What Is Littermate Syndrome?

Littermate syndrome is a term trainers use to describe the behavioural problems that can develop when two puppies of similar age are raised together. Despite the name, it does not only affect biological siblings. Two unrelated puppies brought home within a few months of each other can develop the same issues.

The symptoms tend to cluster around two patterns. In one, the puppies become hyper-attached. They panic when separated, refuse to eat alone and cannot settle without the other nearby. In the second pattern, the relationship turns adversarial. One puppy becomes dominant and the other becomes anxious and withdrawn, or the pair begins fighting as they mature, sometimes seriously.

It is worth noting that not every pair of puppies raised together will develop littermate syndrome. Some manage perfectly well. But the risk is high enough that most trainers, veterinary behaviourists and responsible breeders treat it as a serious concern. The Pet Professional Guild Australia and other force-free training bodies consistently recommend raising puppies one at a time wherever possible.

If you already have two puppies and are recognising some of these patterns, do not panic. The situation is manageable with the right approach. The strategies below are designed to prevent these issues from developing or to address them if they have already started.

The Ideal Age Gap Between Two Dogs

The recommendation from most canine professionals is to wait until the first dog is at least twelve months old, reliably trained and well-bonded with the family before adding a second. Some trainers suggest waiting until eighteen months or even two years, particularly for breeds that mature slowly.

Why twelve months? By that age, the first dog should have solid foundational obedience (sit, stay, recall, loose-lead walking), be comfortable being left alone, and have a well-established relationship with every member of the household. That first dog then becomes a stable presence for the new puppy, rather than an equally chaotic partner in crime.

A well-trained older dog can actually help a new puppy learn the ropes. Puppies naturally observe and mimic adult dogs. An older dog that walks calmly on lead, settles on a bed when asked, and comes when called models the behaviour you want the new puppy to pick up. But this only works if the older dog is genuinely trained. An untrained twelve-month-old is not a role model. The new puppy will simply copy the bad habits.

The Golden Rule: Separate Everything

If you already have two puppies or have committed to getting a second, the foundation of your training plan is simple in concept and demanding in execution: separate everything.

Separate crates

Each puppy needs a crate of the right size. In the first two weeks, place the crates near each other so the transition to a new home is not compounded by immediate isolation from a familiar companion. After that initial settling period, gradually move the crates apart. The goal is for each dog to sleep comfortably in a separate room. This teaches both puppies that being alone is normal and safe.

Separate training sessions

This is the single most effective thing you can do. Work with one puppy in one room while the other is crated with a Kong or puzzle feeder in another room. Keep sessions short (five to ten minutes for young puppies) and then swap. Each puppy learns to focus on you, not on the other dog. Each puppy hears their own name, learns their own cues and gets undivided attention.

Once each dog has a reliable response to basic cues individually, you can start practising together. But that comes later. Always build the individual foundation first.

Separate walks

Walk each puppy one at a time, at least for the first several months. Solo walks are when a puppy learns to navigate the world with you as the guide, not with the other puppy as a security blanket. A Labrador named Banjo and a Kelpie called Nala from the same household in suburban Melbourne illustrated this perfectly. Together on walks, Nala hid behind Banjo at every new encounter. Alone with the owner, Nala gradually became confident enough to sniff unfamiliar dogs and people on her own terms.

Once both dogs are walking well individually, start combining walks occasionally. But continue solo walks as part of the routine even after the dogs are adults.

Separate socialisation

Socialisation outings need to happen three ways: Puppy A alone, Puppy B alone, and both puppies together. That is three times as many outings as a single-puppy household. Each puppy needs to experience new environments, people, sounds and surfaces independently. A puppy that is only ever socialised with the other puppy present may fall apart in situations where the companion is not there.

Puppy school classes should be separate too. Most Australian puppy schools will not allow two dogs from the same household in the same class, and for good reason. If a nearby school does not enforce this, ask about a different time slot for the second pup.

Separate feeding

Feed the puppies in different rooms or at least on opposite sides of a room with a barrier between them. This prevents food guarding, removes mealtime competition and lets you monitor how much each puppy is eating. A dog that bolts food because the other puppy is nearby is learning anxiety around mealtimes, not good eating habits.

A Sample Daily Schedule for Two Puppies

Structure is what keeps a two-puppy household functional. Here is a sample schedule that balances individual attention, joint time and rest.

1. 6:30am Both puppies out for a toilet break together. Brief supervised play in the yard.
2. 7:00am Feed puppies separately (different rooms). Crate both after eating for a post-meal settle.
3. 8:00am Solo walk with Puppy A (15–20 minutes). Puppy B in crate with a frozen Kong.
4. 8:30am Solo training session with Puppy B (5–10 minutes). Puppy A in crate.
5. 9:00am Supervised play together in the yard or living room (15–20 minutes). Then both crated for a nap.
6. 12:00pm Both out for toilet break. Feed separately. Brief individual handling or grooming practice.
7. 1:00pm Solo walk with Puppy B. Puppy A in crate with enrichment.
8. 1:30pm Solo training session with Puppy A.
9. 2:00pm Both crated for afternoon nap. Puppies need 18–20 hours of sleep per day.
10. 5:00pm Both out for toilet break. Feed separately.
11. 6:00pm Family time with both puppies. Calm play, handling practice, settling on beds near the family.
12. 8:00pm Final toilet break. Puppies crated in separate rooms for the night.

This is a lot. There is no getting around that. The schedule above assumes at least one person is home for most of the day, which is not realistic for every Australian household. If both adults work full-time, a dog walker, doggy daycare or a trusted friend who can handle one puppy at a time during the day becomes essential.

Training Fundamentals for Each Puppy

Both puppies need the same foundational skills, taught individually. Here is the priority list.

Name recognition

Say the puppy’s name. When the puppy looks at you, mark with “yes” and treat. Practise with zero distractions first. This is especially important in a two-dog household because each puppy needs to learn that their name means “pay attention to the human,” not “look at the other dog.”

Recall

A solid recall is a safety skill. Practise in a hallway or small room first. Call the puppy’s name, mark when they turn toward you, reward when they arrive. Build distance and distractions slowly. In Australia, off-leash areas and beaches are a big part of dog culture, and a reliable recall is the ticket to enjoying them safely.

Settling on a mat

Teach each puppy to lie on a designated mat or bed and stay there. This skill is a lifesaver in a multi-dog home. When one puppy is being trained, the other can be on a settle mat in the same room (once the skill is reliable) rather than needing to be crated every time.

Loose-lead walking

Teach this individually before attempting tandem walks. A puppy that pulls toward the other dog on lead is not learning to walk with you. Use a front-clip harness (brands like Balance Harness and Rogz are widely available in Australia) and reward the puppy for walking with a loose lead beside you.

Crate comfort

Both puppies must be comfortable spending time in a crate alone, without the other puppy visible or audible. Build this gradually with positive associations. Treats in the crate, meals in the crate, Kongs in the crate. Never use the crate as punishment.

When and How to Train Them Together

Once each puppy has a reliable response to basic cues on their own, you can begin working them together. This is the payoff for all that individual work.

1. Start in a calm environment. Both puppies on leads, one person per dog if possible. Ask for a simple cue like sit. Reward each dog individually.
2. Practise parallel walking. Walk both dogs side by side with enough space that neither can reach the other. Reward calm, forward movement. If one dog fixates on the other, increase the gap.
3. Add duration to settle. Both dogs on their mats, three metres apart. Reward each for staying. Gradually reduce the distance over multiple sessions.
4. Introduce joint recall. In a fenced yard, call one dog’s name. Reward only the dog that comes. The other dog learns that someone else’s name is not their cue to move.

If the dogs fall apart when working together, go back to individual sessions. That is not a failure. It is the training telling you what the dogs need.

Managing the Relationship Between Two Dogs

Two puppies in a household will develop a relationship with each other, and that relationship needs guidance.

Supervised play is fine and healthy. Wrestling, chasing and mouthing are normal puppy behaviours. But watch for signs that one puppy is always on the bottom, always being chased, or always trying to disengage while the other keeps pushing. Interrupt overly rough play before it escalates. A simple “enough” followed by a brief separation and calm-down period teaches both dogs that play has boundaries.

Resource guarding can surface when two dogs share a home. Feed separately. Pick up high-value chews when both dogs are loose. Give each dog their own bed and their own toys. If guarding does appear, do not punish it. Manage the environment to prevent the trigger and work with a qualified, reward-based trainer to address the underlying emotion.

Watch for one puppy becoming overly dependent or withdrawn. If one dog always defers, never initiates play and seems anxious when the other is active, that puppy needs more individual attention and confidence-building. Extra solo socialisation outings, solo training sessions and solo play with the owner can make a significant difference.

Common Mistakes When Raising Two Dogs

Letting them do everything together. The most common and most damaging error. Two puppies that eat, sleep, walk, play and train together 24/7 have no reason to bond with humans and no practice being independent.

Treating them as a unit. Each puppy has a different personality, a different learning speed and different fears. A Staffie cross named Diesel might sit on cue after three sessions. The Cavoodle next to him might need three weeks. That is normal. Comparing them or expecting identical progress creates frustration for everyone.

Skipping individual socialisation. Taking both puppies to the park together does not count as socialising each dog. A puppy that has only experienced the world with a companion may panic in new environments alone.

Waiting too long to address conflict. Puppy squabbles can escalate into serious aggression as dogs mature. If play is consistently one-sided, if one dog is body-blocking the other from resources or people, or if you see stiff body language and hard stares between the dogs, get professional help early. Do not wait for a bite.

Underestimating the time commitment. If the schedule above looks overwhelming, it should. Two puppies require a genuine restructuring of daily life for several months. If that is not realistic, getting one puppy now and adding a second in twelve to eighteen months is a far better path.

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When to Get Professional Help

Bring in a qualified, reward-based trainer or veterinary behaviourist if you notice any of the following: persistent separation distress when the puppies are apart (not just initial whimpering but prolonged howling, self-harm or refusal to eat); escalating aggression between the dogs; one dog becoming increasingly shut down, fearful or avoidant; or if you are feeling overwhelmed and the training is not progressing despite consistent effort.

In Australia, the Pet Professional Guild Australia maintains a directory of force-free trainers and behaviour consultants. Your vet can also refer you to a veterinary behaviourist for complex cases involving anxiety or aggression between housemates.

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Frequently Asked Questions