I read somewhere that a lot of horse people have and love Dobermans. That struck me funny because I've had horses most all my life.
Dobermans are not easy dogs to raise. They are high energy, velcro and they love working with and being with their owner, so eager to learn and very quick about it. BUT....and this is a big BUT...(lol) They, as youngsters can be extraordinarily distractable. They have their own ways of doing things too. They are willing to do the task you ask but they say, "OK, I'll do it, but wait....I have a better way. Watch this." Or, "OK...I will, but now is not a convenient time." lol. In other words, they're creative.
They get bored very easily and they're very sensative so you can't be heavy handed. You have to find out what way they learn best (they are still individuals) and be creative too....keep 'em guessing, thinking and enthusiastic. If they get bored, they get destructive or shall we call that creative too? Creative decorating. lol
I have found what works best with my brood is emphasising the positive, limiting the "no's" as much as possible and instead distracting, showing them what I want and rewarding for ceasing a bad behavior. Or trying to have them do a behavior which is incompatible with what they're doing. If they're about to jump up on you, for instance, tell them to sit. They can't jump if they're sitting. Then reward for sitting. Soon they find that nothing good comes from jumping up on you and that behavior extinguishes itself.....no kneeing in the chest, no rotten time for the dog. He's just learning what to do and what not to do....what works and brings reward and what doesn't and learning happily.