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My new Dane Perdi is really starting to lay into my other dog Duke...she is mellow, he is hyper, so I can see that sometimes he gets on her nerves...BUT, she is attacking him for what seems like to me no reason...I'm sure she has her reasons, but it's getting rediculous and I don't see them.  Today for example, my friend came over, Duke (my Lab mix) ran in behind her and they both came back to my room.  Duke was sniffing around the room and then Perdi came in behind my friend and hurried over to Duke and jumped on him and grabbed him by the back of the neck and really started shaking him hard; this time really scared me and he was shaking like a leaf trying to crawl under the bed...this is the 5th attack in almost 3 weeks-my friend was even taken aback by the attack.  Most of the time they are not completely together because I was letting them slowly adjust over gates and also during play time outside.  She is way possessive of me I believe since she has done it when he is near me and he does not instigate the fights; normally he stays away from her.  He actually stays away from me out in the yard if she is near me and is scared of her.   She constantly raises hackles at him if he comes near and I correct her on leash with a verbal stern "no".  A few times she didn't even warn him, just BAM, grabbed him.  Now he is a very submissive dog and will cower down, but she doesn't give him a chance and he has started to try and fight back and I don't blame him.   My poor dog is scared to death and I think is getting a bit depressed since he seems to think that he can't play with us and that is a big part of his existence, to Play!  I just don't know what to do.  My biggest worry is that what if they happen to go at it and my kids are nearby and they get hurt.  I can stop her, but they can't...we just got her and she has had a bit of a traumatic life these last 3 months or so-a hurricane evacuated dog previously owned and evacuated with, but multiple moves and such has made her a bit nervous.  I also do not think that she was ever properly socialized with other dogs and we do have Saturday socialization sessions coming up this weekend with a trainer.  I want her to be a good dog, but I don't know what to do about her attitude.

Any suggestions?  I just don't want anyone hurt, but I don't want to have to rehome her either...she's been through enough already...

I posted yesterday about being a Newbie here and getting my first full dane...I have no clue where the post went....could someone elighten me as to where to look....Thanks!

Perdi is adjusting...ev erything is so scary for her...sometime s it just makes me sad that she never was properly taught things...she is crate training right now and went in for the first time this morning...shoo k like a leaf, but she's so attached to me that she wasn't going to sit outside that cage for long with me inside calling to her...she likes to chew my door trim when I leave, so we need to make sure she is safe while we are gone.  Not only that I can't always take her everywhere with me like we do right now!  Although she loves it, so do we, and atleast people stay away from our truck ;-)! 

We're taking her today to get a nice treat for when she kennels up.