I had the same problem introducing a Shih Tzu puppy into my house with a 5 year old male Dobe. It was wild around my house for awhile. The Dobe would not leave her alone!!! In time, though, she stood up to him. Those little sharp teeth on his neck and legs calm him down lots!
I make the Dobe "get on the couch" when things get too wild. He's funny, his ears will lay straight back!
Here is a link to a website of a lady who has Dobes and a Doxie who I think will be glad to correspond with you. She helped me when I had the same problem. www.tylerdog.com
I'm sure time will take care of the situation, my dogs are best friends now.
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