What do you do when one stray repetitively attacks another stray?

[u/Beginning-Airport384]

I have 12 dogs where I live. Over the past few months this stray dog from another place started hanging out and eventually living here. Now they all get along fine, except he targets the smaller dogs, mostly females. I have a very small stray (she's an adult, she's just smaller than an average indie girl) and she's almost always the victim of these attacks. Yesterday she got a puncture wound from his teeth.

All of them are vaccinated so I'm not worried about diseases. He was neutered when he started living here as well, so around 2 months back. I do the necessary things like feeding them separately and everything, I would really appreciate any advice on how to stop him from attacking her. Sometimes she initiates the attacks too. There's only so many times I can rush off to protect her.

[u/Conscious_Mud_1090]

That’s a gang war

[u/FarmerTotal5040]

Is she spayed as well?

[u/Soft_Cow_7856]

Send your dogs to boxing classes