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The Doctor Dolittle method usually works you got to walk and talk to them and show them they got a mutual friend. Cheers!
Introduce them on neutral ground..
And lead one dog to the rear of the other and let it sniff the other dogs behind..
Then take the other dog behind the first dog and let it stiff the other dogs behind..
This is best done while walking the dogs together and make sure both dogs are leashed so you can control the situation..
They both should be on leashes and introduce them and pull them away if obvious they won't get along.
lol That's all fine and good as long as one of them doesn't turn into an angry drunk. :p
It USUALLY is. Most dogs don't like conflict and will establish their boundaries fairly easily. In fact, often the only reason dogs get tense around each other is because their owners get tense, and the dogs read the owners' tension as "Be afraid. Dangerous stranger approaching."
But sometimes dogs simply can't figure it out. My ex-wife and I had two dogs, Nellie and Zeke, and we were going to adopt a third dog because a friend was being evicted and wasn't sure if she could find a new living situtation which could include her dog Frankie. Frankie got along fine with Nellie, but Frankie absolutely WOULD NOT TOLERATE Zeke and would try to attack if they got near each other. Zeke was the most mild-mannered non-confrontational dog I've ever known (he would literally let Nellie trample him without complaint). But, for whatever reason, Frankie would not allow Zeke to be near him.
Thankfully, Frankie found another home, so it all turned out OK. but sometimes such things happen.
Some of it comes down to training, too. My lab needs more training. She obeys commands, but her instinct is still to pounce on an "intruder" dog and tell him to go away. When she's introduced to new dogs, I have to condition her to accept them. I don't just let her go see them. I make her control herself and show that she's going to be mellow and listen to me before I let her say hello.