Introductions are most important. Dobermans are very pack rank oriented. That means when you bring a doberman into a family/pack, he needs to know his place or he’ll act out and try to force his place. If you already have the doberman then I’m hoping you’ve already established that you are the Alpha in the pack. The doberman will fall right in line. Because you are established as the Alpha, you could have 15 male dogs in your house if you wanted. They follow the Pack Leader…you. Once they know their place they’re fine. When introducing the doberman to the dane, you need to decide who is above the other. They can’t be equal…you might treat them as equal but in their pecking order to each other, it needs to be a defined line in the sand. Since your doberman was there first, I strongly recommend he be ranked higher especially since Danes are push overs and just happy to be family lap dogs. So when introductions are made, make sure you have both dogs together (after time together for awhile) and then roll the dane onto his side with the doberman nearby. This act of submission with the doberman around will tell the dane he is not above those nearby. This might have to be done a few times but the Dane isn’t stubborn. Both should be fine together unless one is dog aggressive in general. At that point you’ll need to break that but you havent’ alluded to that so I wouldn’t worry about it. Heads up with a great dane though. While they have short hair like dobermans, they also secrete an oil on their skin that makes them stink. Grooming needs to be done more often with a Dane than a doberman.
Danes are also very sensitive and emotional. They don’t need harsh corrections and can be traumatized if you use the same techniques as you would use for a more stubborn breed. They want to be with their people as much as possible and most love to cuddle. If you are sad or sick, there’s no better nurse than a Dane. Well, maybe a cat, but we’re talking about dogs. The INTJ (apart from their future goal oriented perceiving) is more similar in interaction to the INFP than the INFJ. Why is this? Since the INFP leads with Introverted Feeling, they decide themselves what is moral. They have their own internal system of morality which they then use to come up with ideas through their Extroverted Intuition (Ne) For the INTJ, which I am, we have tertiary introverted feeling. This is a function which hangs in the background, and we don’t usually consciously use it, However, it balances out our consequential nature due to our auxillary Extroverted Thinking (Te) with moral guidelines to prevent us from destroying our connections to other people and retain stability in the INTJ. The INFP knows in themselves what is right. Disagreeing with the INFP will lead them to become very hostile towards you. The arguments they construct are based out of their inner Introverted Feeling (Fi) and due to their inferior Te, they have a tendency to ignore factual evidence that goes against their ideas. This can lead them to become very independent and individualistic, but also leads them on average to have the lowest earnings of all the 16 types due to their rejection of of the corporate world, which also stems from inferior Te. INFPs are stubborn when they believe they are right.