Introducing Your Dog to Other Dogs is an important part of the socialization process. Here's everything you need to know about this topic.
Introducing Your Dog To Other Dogs
You've decided to bring home a new dog to serve as a buddy to the dog you've had for years. You just know they'll get along great. But your old companion may have different ideas. Here are a few tips to get you started:
Make the introduction on neutral ground. Because dogs are territorial, it could be a bad idea to bring that new pooch into Fido's realm and force him to accept her. Rather than threaten him with another dog in his domain, let the dogs meet in the park or at the breeder's. In fact, going on a long walk with the two of them can be a great way to bring them together. The walk will serve to take some of the focus away from the new dog, and they can gradually check each other out as their curiosity gets the best of them.
Don't force them together. They should definitely have separate crates or beds, even after they become friends. Their food and water bowls should be in different places, at least until they get accustomed to each other. 
Don't let them fight over things. Keep all toys and treats out of their reach, and play with each dog fairly and equally, especially at first. Remember that your time and attention are also something to fight over, and try to give enough attention to both dogs.
Don't leave them alone together until you're sure they friends. It could be cruel to leave them together for any amount of time if they are obviously still uncomfortable with each other. Don't ever let them get into a fight. If you see them staring each other down, separate them immediately.
Keep Your First Dog in Mind
What happens a lot of the time is that a new puppy comes into the house and everyone is so excited to play with the it that the older, less-exciting dog is ignored and excluded. Dogs can get extremely jealous, and jealousy will actually cause them to misbehave or act out (much like children will do when attempting to get your attention).
Make sure the older dog gets lots of love and attention even with the new pup in the house. If you're all together, let one person cuddle the new pup while you play with the other, and then switch after a few minutes. This will help your dog feel like he hasn't been replaced, and will go a long way in helping introduce your dog to other dogs.
