hi, my boy hates dobermans because he was attacked by one, the little ones are fine!!!!.go figure!!. try to introduce through the fence it might take months!!. but give it a try. i didthis last week with a med ,size dob and he wasnt realy sure what to do but didnt'growl or napp at the dog!!!. try this and let me know how it goes, still trying thangs myself too. i'll keep u informed if something works!!.