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I'm thinking of adding another dog... is this a good idea?


Staff member
Generally if you are going to add a second PUPPY you want to wait til the first dog is a mature, trained ADULT: meaning at LEAST a year old (but even this is really very young). The general recommendation from trainers, *responsible* breeders (who are not just trying to make a second puppy sale) and experienced owners is to wait til the first dog is 18 months to 24 months old and TRAINED. It might seem a great idea to get a second pup while you are enamoured of your first cute one -- but adolescent dogs in particular become a real challenge (like teens) and will need your full time and focus. Adding a pup makes it very difficult to properly work with dog one and very soon you have a second in the same phase-- which can be an exhausting nightmare. Also, waiting til Dog #1 is older and trained means s/he makes training #2 much easier as the older calm trained dog serves as a great role model. But listen to dog owners giving advice HERE.

And more points to consider:

Multi-Dog Households


Congratulations … and our sympathy at the same time! Having two dogs can be a great experience, but it can also
be a lot of extra work, money, and management. Are you prepared to deal with the extra cleanup, additional
expense, lost time, changes in behavior of your existing pets, and the possibility of canine rivalry? If you’ve recently
experienced a change in your household, such as marriage, divorce, job change, death, a new baby, a new roommate
or a new residence, now is probably no the right time to adopt a second dog. It is better to wait until all major
changes are settled and your lifestyle is a serene as possible.

Does your current dog have any behavior problems such as barking, destruction, aggression, or fearfulness? Dogs
can mimic and learn from each other. So, for example, if you are getting a second dog in the hopes that your
existing dog will not bark as much, you are much more likely to end up with two barking dogs! Getting a playmate
for your dog does not solve behavior problems. In fact, in most cases, the problems will intensify.
Are you looking for a second dog as a companion for you or for your dog? Are you sure your dog wants a
companion? Most senior dogs aren’t looking for a new puppy playmate. If your dog is a bully or protective of you,
the chances of your finding another dog who is compatible are quite slim. If your dog has always lived alone, he
may not want to share his life (or his territory, toys, treats, walks, etc.) with another dog.

How old is your existing dog? If he/she is younger than 14 months old, you may want to wait until he/she has
reached sexual maturity and has developed their stable, adult temperament before you add to the family.
What sex is
your existing dog? Males and females tend to do better together than same-sex pairs. A male dog and a female dog
will tend to see each other more as companions and less as competition. Ideally, your dogs will be opposite sex and
similar in terms of size and energy. A large dog can easily injure one who is more than fifty percent smaller than
him/her, and an energetic puppy can easily irritate a mellower adult dog.

Dogs that live in groups naturally establish a social structure (or pecking order). This social structure serves to
maintain order, reduce conflict, and promote cooperation among group members. Dogs do not view the world in
terms of fairness and equality, and if you undermine the structure they create, you risk far more serious problems.
Successful management of multi-dog households includes respecting this natural hierarchy, keeping all members of
the household safe during the adjustment period, and maintaining good interactions and a healthy relationship
between your dogs.

Adding a second dog to the household will change your dog in many ways. Are you ready to accept this? Dogs,
given the opportunity, will bond to each other rather than you, and your dog will likely change with the addition of
another pack member. Be prepared to facilitate the adjustment period for both dogs.

(from Berkeley Humane Society)


Multiple Dogs: What is the Right Number for You?

Canine Behavior Series
If having one canine family member is great, wouldn't two be better? How about three when you now have two or four if you now have three? Are there reasons to limit the number of dogs in your family? Let's look at the advantages of living with multiple dogs along with how things change as you add canine companions.

Why More Can be Better

Two or more dogs who are compatible can provide exercise for each other. This works best when they are of similar size and activity level, and both are free of physical problems that could cause pain or irritability.

Two or more dogs can provide each other with dog-to-dog social interaction. This daily contact with their own species tends to keep their ability to communicate with other dogs in good shape.

Humans who enjoy watching dog behavior will enjoy seeing the family dogs interact. Since you also get to see the dog-to-dog relationships develop over time, your understanding of your dogs can grow by watching how they react to each other. Your ability to read canine body language can be enhanced.

Compatibility Issues

Incompatible dogs are those who can't work out a relationship and will injure each other. Breeders and others with dogs who are not compatible in one group manage by separating the dogs into smaller groups or separating any two dogs who are not compatible.

Plan to separate your dogs for feeding, even if they are compatible. If you have a dog accustomed to free-feeding, plan to retrain that dog to scheduled meals. It's much safer to separate dogs for feeding before there is a fight rather than waiting to see if there will be one.

Dogs cannot live together in unlimited numbers without fighting. In nature they would separate into compatible groups. This serves to spread them out so that they don't all wind up in one area where there wouldn't be enough food for all. In our homes the dogs are not able to separate into compatible groups, so this becomes a human responsibility.

Two dogs together will do things that neither of them would have done alone, such as chase and possibly kill a smaller animal. Each additional dog increases the intensity of pack mentality. If you have one dog or two dogs now doing well living with cats or birds or young children, you might find adding another dog would change that balance.

You can usually keep one female dog and one male dog together peacefully, though the early stages of the relationship may be rocky. Compatibility issues arise with same-sex dogs, and predicting which dogs will be compatible with each other is difficult. It helps to research each breed carefully, to observe each dog's behavior in training classes and other settings around other dogs and to arrange playdates with dogs similar to those you are considering.

Dogs learn from their experiences, and can be permanently changed in their ability to get along after a new dog is introduced, even if later the family places one of the dogs in a new home. The same can happen with visiting dogs or foster-care dogs.

Legal Issues and Available Facilities

Local regulations often limit the number of dogs a person can keep on a residential property. You'll want to check this out before adding another dog, rather than risk having to give up a dog after it has become a member of your family. Check local laws, neighborhood covenants, landlord agreements, and liability insurance limitations for your situation.

A majority of people with dogs in the United States have fenced yards. Of course this is not a requirement for having a dog, but it helps so much with the day-to-day management that it tends to be how people arrange things. Whatever your home situation, take careful thought as to whether you can accommodate an additional dog with the facilities you have.


Adding another dog tends to add a surprising amount of time to your daily dog-tending duties. Each dog needs individual attention from humans, away from the other dog. Each requires grooming, exercise, training, medications, poop clean-up and a lot more.

Another dog in the family increases the chances of a dog throwing up or needing an emergency trip outside in the middle of the night. It's no wonder research has found that people who have their dogs in the bedroom during sleeping hours tend to lose some sleep!

Medical Care

Like humans, dogs do get sick and injured in spite of the best efforts at good management. The more dogs you have, the more often you'll be dealing with the expense, heartache, and sometimes incredible amount of work to care for a sick dog.

Total medical care expenses increase with multiple dogs even when none are ill, for such things as parasite control, vaccinations and other routine procedures. When one of the dogs contracts a contagious disease, having multiple dogs often means it will spread to others of your dogs. Treatment for such an episode can get pricey.


People with one or two dogs are often able to take them along on day-trips, visits to friends or relatives, and on vacation. Going from one dog to two, or from two dogs to three can change all that. How would it affect you to have to leave your dogs behind?

You'll want to consider how increases in being boarded or cared for by a pet sitter would affect the dogs you have. Boarding and pet-sitting can both cause health and behavior problems in dogs.

If you have people come to visit you with dogs, adding an extra dog to your family can complicate these visits. Every additional dog places more pressure on the pack. One more dog in your family might mean the group can no longer peacefully tolerate visiting dogs.

Is This the Right Time?

It takes time for a dog to bond with the human family members and for the pack to stabilize. Two years is a good interval between adding new canine family members. During this time you'll want to work through any behavior problems the dog has, or else the problems might spread to the next dog!

You'll also want to train the dog to the point of good manners and control. If this is not done before adding the next dog, chances are that both dogs will wind up losing out in the training department. Everything you learn by training with one dog prepares you better for training with the next, and the trained dog(s) in your family will help you train the new one.

Sometimes people add a new dog because of an emotional need in the human's life. This is fine, of course, as long as it's good for the dogs and for everyone in the family. Thinking about the reasons you want another dog and your family's resources for dog care will help you make a good decision.

Kathy Diamond Davis is the author of the book Therapy Dogs: Training Your Dog to Reach Others. Should the training articles available here or elsewhere not be effective, contact your veterinarian. Veterinarians not specializing in behavior can eliminate medical causes of behavior problems. If no medical cause is found, your veterinarian can refer you to a colleague who specializes in behavior or a local behaviorist.

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