Was the rott also male ? Some dobes are very same sex aggressive.
I would start out with a dog of the opposite sex.
I also would find a neutral closed in yard to let them meet off leash in so one or the other does not already "own" the yard.
Hi! Yes the Rottie is a male. But I figured it would be fine since Jack is still a puppy (5.5 months). He's been around both with no problems in the past, but when he was much younger. I'm afraid that we may have lost the socialization window. He's great with all people and kids though.
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