Another day,another fight.

I'm thinking this may not work out.
He has a serious issue I can't get a handle on.
Here's the situation.
This morning.
Walking on leash,both dogs,me with Rocky and Sam with Daisy.
All the way down the street his focus changes from sniff to look at Daisy,sniff,make a bit of a lunge at her,then back to walking and sniffing.
Once we hit the dirt,and the area has been visually cleared of people and dog we let them off leash.She wants to sniff now and he turns into the Hulk,going agro at her.This pisses her off and now they start fighting.For him it was kind if a game it seems,part keep away and part Ninja attack, not appropriate behavior.Once Daisy shifts into fight mode then he does too.
Once I break them out of it then they go to acting like pals for the most part.
It sucks,as he's a great fit in every other way.He's a bit too aggressive for her and she's over it.
I believe he would be better in a home with either a much less dominant dog or a much more dominant dog that would put him in his place...such as his experience with Aprils dogs.He sure as heck didn't try this with them while I was watching.He did it to Daisy,but not with them.
She told me(and one of the first things she told me at that) was he came to her thinking he was all the tuff guy,so it's not like this is out of left field or anything.We're going to try to deal but at this point he needs some training or??? that is beyond my experience.Quite honestly it may be beyond my patients level as well.
I wish
dh8 lived closer

Rocky is a good boy,except for this issue.He's a great big lover.He's sweet with my kids,and wife.He's a bit goofy at times.
His basic commands he has down solid.
He's so proud of himself for getting the stairs mastered.He went down this morning then turned around and went right back up.He did this 3 or 4 times
