Introducing a New Dog Into Your Household

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Introducing a new dog into a household where there is already another pet, whether a dog, cat, bird or small mammal, can be quite tricky. How to accomplish this without squabbles or bloodshed is a question often posed to animal behaviorists. The character of any new dog you plan to integrate is an important factor. Where possible, you should take into account the sex, age, breed, and past experience of any dog you plan bring home before making a commitment.

The impact of obtaining a new dog can be strenuous on the other pets in the household. However, once the initial stress of introductions has passed, the new arrangement can turn out to be a happy one!

Dog to Dog Introductions

If the incumbent dog has lots of energy for playing, obtaining a puppy or young adult dog is appropriate. However, if your present dog is unlikely to tolerate the antics and energy of an adolescent dog, consider getting an older dog that will not be trying to compel your old faithful to play all the time.

It’s best to choose a dog of the opposite sex to add to your household. This will decrease the chance of aggression. Begin by reading books that give unbiased opinions of breeds to choose the one that has the best chance of getting along with your resident dog.

Avoid breeds known for aggression to other dogs as a breed characteristic (e.g. pit bull terriers). Don’t get upset when the resident dog tells the newcomer to “bug off.” This is how the new dog learns the house rules. A hierarchy will develop over the first few weeks, and in general, the older and incumbent dog will and should occupy the “alpha position.”

Here are some tips on how to introduce two dogs:

  • It may be possible to introduce the dogs in a relaxed manner by just letting them sniff and play – as long as both are known to be friendly with other dogs.
  • If you are not sure how the dogs will react, start off cautiously by taking them for a walk together on neutral territory (e.g. a park, not your yard). When they show friendly behavior toward each other or begin to ignore each other, move the exercise to your back yard. Finally, allow the dogs to be together in your home.
  • Be aware that wagging tails do not necessarily mean that dogs are happy to see each other. A straight up tail that wags stiffly is a dominant signal. Such a display might herald aggression. If one of the dog’s tails is tucked down between its legs, that dog is afraid and nervous. This calls for a gradual, well-supervised approach to avoid making the dog even more fearful. If a dog’s tail is horizontal and wagging in a relaxed fashion, it’s all systems go!
  • When the dogs eventually meet off-leash, one of them is going to need to establish dominance. This is a normal and necessary step in a dog-dog relationship, but sometimes the process can look and sound pretty scary. The dogs will maneuver around each other and may even scuffle to the point at which one dog ends up on his back, with the other dog standing over him. There may be some nipping and grabbing of the neck or throat. Try not to worry too much when this happens. It is normal for dogs to engage in such roughness. Once the dominant dog establishes himself, he probably won’t feel the need to repeat these maneuvers as long as the subordinate does not keep “trying it on.”
  • Once the dogs are together, make sure that you support one dog as dominant (this will probably be the resident dog). Show him he is number one. He should be fed first, petted first, given attention first, and should be given the favorite sleeping area. Don’t expect the dogs to share. Sharing isn’t normal for most dogs. Feed the dogs separately (across the room) and don’t give really delicious chew toys (rawhides, pigs’ ears) at first. Once the hierarchy is secure, you’ll probably be able to give the dogs all the chew toys they want.
  • Dog to Cat Introductions

    Age and sex of a dog are not major concerns when adding a dog to a household where there is a cat. However, a puppy will naturally be more inclined to want to play with the cat, so if your feline will not tolerate a pushy puppy, consider an older dog.

    There’s an advantage, however, to adding a puppy to a cat-dominated household: the puppy will learn to tolerate or even like cats as he grows up. 

    If you are obtaining an adult dog, find out whether the dog has a past history of living amicably with cats, or has been tested with cats. If you are looking to obtain a dog from a breed rescue or professional breeder, take special care when considering a breed that has a reputation for being aggressive to cats.


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